Effective November 1, 2026, the Postal Service™ is revising the Individual Country Listing (ICL) for various countries in Mailing Standards of the United States Postal Service, International Mail Manual (IMM®) to reflect new customs data requirements for certain items containing goods destined to various European Union (EU) countries and territories.
As part of the EU’s customs reform efforts for distance sales, mailers will be required to provide all applicable product identifiers (PIDs) for Business-to-Consumer (B2C) shipments sold directly to addressees in various EU countries and territories. To filter out transactions for which PIDs are not required, the Postal Service may also ask whether the mailer is a business and whether the transaction is a B2C or business-to-business (B2B) transaction. There are three types of product identifiers that must be included, as applicable:
n Merchant Product Identifier (MP) — Mandatory. The MP identifier is assigned by the online seller, marketplace, or platform. It uniquely identifies the product within that platform (e.g., internal SKU or item code), 50-character maximum.
n Non-standardized Manufacturer Product Identifier (NS) — Mandatory. The NS identifier is assigned by the manufacturer, producer, or supplier. It does not rely on an international standard, 70-character maximum.
n Standardized Manufacturer Product Identifier (SP) — Conditional (mandatory only where one exists). A globally recognized identifier such as a Universal Product Code (UPC) or International Standard Book Number (ISBN). The SP identifier is only required if the product has a globally standardized code, 50-character maximum.
The new data requirements apply to B2C shipments containing merchandise or commercial samples destined for the following countries and territories:
n Austria.
n Belgium.
n Bulgaria.
n Croatia.
n Cyprus.
n Czech Republic.
n Denmark.
n Estonia.
n Finland (incl. Aland Islands).
n France (incl. Corsica, Mayotte, and Monaco).
n French Guiana.
n Germany.
n Gibraltar.
n Greece.
n Guadeloupe (incl. Saint Bartholomew and Saint Martin).
n Hungary.
n Ireland.
n Italy.
n Latvia.
n Lithuania.
n Luxembourg.
n Malta.
n Martinique.
n Netherlands.
n Poland.
n Portugal (incl. Azores and Madeira).
n Reunion.
n Romania.
n San Marino.
n Slovak Republic (Slovakia).
n Slovenia.
n Spain (incl. Canary Islands).
n Sweden.
Mailers remain solely responsible for the accuracy and completeness of all customs information related to their mail, including the accuracy of the transaction type and product identifiers. Failure to provide complete and accurate information could result in additional charges, and the return or confiscation of the mailpiece. The Postal Service is not liable for any of the following:
a. Any incorrect or insufficient product identifier(s).
b. Any other incorrect or incomplete information for customs declarations in whatever form such information is made.
c. Any decision taken or charges imposed by any domestic or foreign customs authority.
Mailing Standards of the United States Postal Service, International Mail Manual (IMM)
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Individual Country Listings
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Austria
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
6. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Belgium
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
7. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Bulgaria
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
4. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Croatia
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
3. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Cyprus
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
4. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Czech Republic
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
6. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Denmark
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
5. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Estonia
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
4. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Finland
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
7. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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France
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
11. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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French Guiana
Country Conditions for Mailing
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Observations
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[Number the current entry as item 1. and add a new item to read as follows:]
2. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments.
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Germany
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
11. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Gibraltar
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
3. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Greece
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
7. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Guadeloupe
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
3. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Hungary
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
6. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Ireland
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
10. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Italy
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
8. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Latvia
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
4. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Lithuania
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
3. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Luxembourg
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
5. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Malta
Country Conditions for Mailing
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Observations
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[Add a new entry to read as follows:]
7. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
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Martinique
Country Conditions for Mailing
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Observations
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[Add a new item 2. and renumber current item 2. as item 3. to read as follows:]
2. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
3. Otherwise, same as France.
* * * * *
Netherlands
Country Conditions for Mailing
* * * * *
Observations
* * * * *
[Add a new entry to read as follows:]
6. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
* * * * *
Poland
Country Conditions for Mailing
* * * * *
Observations
* * * * *
[Add a new entry to read as follows:]
4. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
* * * * *
Portugal
Country Conditions for Mailing
* * * * *
Observations
* * * * *
[Add a new entry to read as follows:]
5. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
* * * * *
Reunion
Country Conditions for Mailing
* * * * *
Observations
* * * * *
[Add a new entry to read as follows:]
2. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
* * * * *
Romania
Country Conditions for Mailing
* * * * *
Observations
* * * * *
[Add a new entry to read as follows:]
3. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
* * * * *
San Marino
Country Conditions for Mailing
* * * * *
Observations
* * * * *
[Add a new entry to read as follows:]
6. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
* * * * *
Slovak Republic (Slovakia)
Country Conditions for Mailing
* * * * *
Observations
* * * * *
[Add a new entry to read as follows:]
7. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
* * * * *
Slovenia
Country Conditions for Mailing
* * * * *
Observations
* * * * *
[Add a new entry to read as follows:]
3. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
* * * * *
Spain
Country Conditions for Mailing
* * * * *
Observations
[Add a new entry to read as follows:]
6. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
* * * * *
Sweden
Country Conditions for Mailing
* * * * *
Observations
* * * * *
[Add a new entry to read as follows:]
6. Effective November 1, 2026, the mailer must include all applicable product identifiers for each item within a mailpiece containing goods for Business-to-Consumer shipments:
n Merchant Product (MP) identifier — Identifier assigned by the seller, marketplace, or platform (e.g., internal SKU or item code).
n Non-standardized Manufacturer Product (NS) identifier — Identifier assigned by the manufacturer, producer, or supplier (e.g., internal SKU or item code).
n Standardized Manufacturer Product (SP) identifier — Globally recognized product identifier (e.g., UPC or ISBN).
The MP and NS identifiers are mandatory for all B2C mailpieces, and the SP is mandatory only when such identifier exists. All applicable product identifiers must be appended to the end of the item description on the customs form (e.g., Women’s 100% Cotton T-Shirt [MP=123456789;NS=987654321;SP=112233445]). USPS API users must utilize the product identifier attribute fields. Shipping Services File users must utilize the G1 and G2 fields of the Shipping Services File, as applicable. The Business-to-Consumer indicator must be indicated in the incoterms field of the Shipping Services File and USPS API.
* * * * *
Although effective November 1, 2026, the Postal Service will incorporate these revisions into the January 17, 2027, edition of the online IMM, which is available via Postal Explorer® at pe.usps.com.
— Product Classification,
Product Solutions, 11-12-26
