Effective June 26, 2025, the Postal Service™ is revising Mailing Standards of the United States Postal Service, International Mail Manual (IMM®), Exhibit 292.45a and Exhibit 293.45a, to update the foreign office of exchange codes for items sent to Brazil via:
n International Priority Airmail® (IPA®); and
n International Priority Surface Air Lift® (ISAL®).
Periodically, the Postal Service receives such requests from foreign posts to facilitate operational needs. To provide mailers sufficient time to make necessary logistical and software changes, the Postal Service (through this Postal Bulletin article) is providing advance notice that mailers must begin using the appropriate foreign office of exchange code for IPA and ISAL M-bags effective September 28, 2025. However, mailers are encouraged to immediately implement this change to expedite delivery.
Mailing Standards of the United States Postal Service, International Mail Manual (IMM)
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2 Conditions for Mailing
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290 Commercial Services
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292 International Priority Airmail (IPA) Service
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292.4 Mail Preparation
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292.45 IPA Foreign Office of Exchange Codes and Price Groups
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Exhibit 292.45a
IPA Foreign Office of Exchange Codes and Price Groups
[Revise the entry for Brazil to read as follows (reflecting the addition of M-bag behind package-size):]
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293 International Surface Air Lift (ISAL) Service
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293.4 Mail Preparation
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293.45 ISAL Foreign Office of Exchange Codes and Price Groups
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Exhibit 293.45a
ISAL Foreign Office of Exchange Codes and Price Groups
[Revise the entry for Brazil to read as follows (reflecting the addition of M-bags behind package-size):]
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Although effective June 26, 2025, the Postal Service will incorporate these revisions into a later edition of the online IMM, which is available via Postal Explorer® at pe.usps.com.
— Product Classification,
Product Solutions, 6-26-25
