CSMS # 69289734 - Implementation of Entry Type 13 Test in ACE for U.S. Mail Processing (INT-057) and Mail Entry Type 13 Test (CBP-290) – Deploying to ACE CERT Environment on July 24, 2026 and to ACE PROD Environment on September 22, 2026 

U.S. Customs and Border Protection sent this bulletin at 07/20/2026 02:23 PM EDT

Cargo Systems Messaging Service

CSMS # 69289734 - Implementation of Entry Type 13 Test in ACE for U.S. Mail Processing (INT-057) and Mail Entry Type 13 Test (CBP-290) – Deploying to ACE CERT Environment on July 24, 2026 and to ACE PROD Environment on September 22, 2026 

On September 22, 2026, U.S. Customs and Border Protection (CBP) will deploy the Implementation of Entry Type 13 Test in ACE for U.S. Mail Processing (INT-057) and Mail Entry Type 13 Test (CBP-290) enhancements to the Automated Commercial Environment (ACE). These enhancements implement Federal Register Notices (FRN) published by CBP on June 24, 2026 (Test of the New Electronic Informal Entry Process for Mail and Indefinite Suspension of the De Minimis Exemption for Merchandise Arriving Through All Modes Other Than the International Postal Network) by implementing the test of Entry Type 13 (ET13), a new entry type for submitting U.S. Postal Service (USPS) international mail shipment data. This update includes impacts to electronic data interchange (EDI).

These enhancements will be available in the ACE Certification (CERT) environment on July 24, 2026, and will be deployed to the Production (PROD) environment on September 22, 2026. 

To learn more about these deployments, refer to the Implementation of Entry Type 13 Test in ACE for U.S. Mail Processing (INT-057/CBP-290) Trade Information Notice located here: https://www.cbp.gov/document/guidance/trade-information-notice-implementation-entry-type-13-test-ace-us-mail-processing  

CBP has published the following ACE implementation guides in support of this effort:

Cargo Release

Draft: ACE CATAIR Cargo Release Chapter

ACE Cargo Release Condition / Error Codes

Entry Summary

Draft: ACE CATAIR Entry Summary Create/Update

Manifest

ACE ANSI X.12 Import Truck Manifest – 309 Customs Manifest

ACE ANSI X.12 Import Truck Manifest – 355 Customs Manifest Acceptance/Rejection

ACE UN/EDIFACT Import Truck Manifest – Standard Truck Manifest Customs Response Accept/Reject (CUSRES) Message

ACE UN/EDIFACT Import Truck Manifest – Standard Truck Manifest Customs Cargo Report (CUSCAR) Message

ACE CAMIR – Air Import Manifest Message Line Identifiers

CATAIR Appendix

ACE CATAIR Appendix B – Valid Codes

CBP will update additional ACE implementation guides to support this initiative. Any future updates will be announced via CSMS.

For questions about this deployment, contact the Cargo Release, Manifest and Export Product Division at CREM@cbp.dhs.gov or the Entry Summary, Accounts, and Revenue Division at ESAR@cbp.dhs.gov.

For technical questions, contact your assigned Client Representative. 

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CSMS # 69289734 - Implementation of Entry Type 13 Test in ACE for U.S. Mail Processing (INT-057) and Mail Entry Type 13 Test (CBP-290) – Deploying to ACE CERT Environment on July 24, 2026 and to ACE PROD Environment on September 22, 2026

Cargo Systems Messaging Service

CSMS # 69289734 - Implementation of Entry Type 13 Test in ACE for U.S. Mail Processing (INT-057) and Mail Entry Type 13 Test (CBP-290) – Deploying to ACE CERT Environment on July 24, 2026 and to ACE PROD Environment on September 22, 2026

CSMS # 69289734 - Implementation of Entry Type 13 Test in ACE for U.S. Mail Processing (INT-057) and Mail Entry Type 13 Test (CBP-290) – Deploying to ACE CERT Environment on July 24, 2026 and to ACE PROD Environment on September 22, 2026 

CSMS # 69289734 - Implementation of Entry Type 13 Test in ACE for U.S. Mail Processing (INT-057) and Mail Entry Type 13 Test (CBP-290) – Deploying to ACE CERT Environment on July 24, 2026 and to ACE PROD Environment on September 22, 2026 