Effective November 27, 2025, the Postal Service™ is revising Mailing Standards of the United States Postal Service, International Mail Manual (IMM®) to reflect changes to the Customs and Border Protection address used when returning duty collection forms (CBP Form 3419ALT) for uncollected items.
These revisions are based on a formal request that Customs and Border Protection made on October 31, 2025.
Mailing Standards of the United States Postal Service, International Mail Manual (IMM)
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7 Treatment of Inbound Mail
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713 Treatment of Dutiable Mail at Delivery Office
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713.5 Treatment of Uncollected Items
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713.52 Reporting of Uncollected Items
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713.522 Disposition of PS Form 2933
[Revise the text to read as follows:]
Forward the original PS Form 2933, with both copies of CBP Form 3419ALT, to the following address:
US CUSTOMS AND BORDER PROTECTION
MAIL ENTRY
8899 E 56TH ST STOP 203J
INDIANAPOLIS IN 46249-0002***
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713.54 Detached Customs Mail Entries
[Revise the text to read as follows:]
When a detached CBP Form 3419ALT is found, attempt to locate the related package and attach the form to it. If the package cannot be located, send CBP Form 3419ALT to the following address:
US CUSTOMS AND BORDER PROTECTION
MAIL ENTRY
8899 E 56TH ST STOP 203J
INDIANAPOLIS IN 46249-0002***
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Although effective November 27, 2025, the Postal Service will incorporate these revisions into the next edition of the online IMM, which is available via Postal Explorer® at pe.usps.com.
— Product Classification,
Product Solutions, 11-27-25
