CSMS 66428010·System update·October 3, 2025·View on csms.cbp.gov ↗

REMINDER: ACE Portal Updates to Enable Electronic Refund Enrollment Now Available – Support Call Planned for October 6

Plain-English explanation

CSMS 66428010 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (system update), published on October 3, 2025. It carries the official CBP guidance brokers and importers must follow for the topic — "REMINDER: ACE Portal Updates to Enable Electronic Refund Enrollment Now Available – Support Call Planned for October 6". CSMS messages are the operational layer between Commerce determinations and at-the-border collections: when Commerce publishes a new rate, scope ruling, or instruction, CBP turns it into a CSMS that ACE/ACS systems and brokers act on.

Message body

Full text as published by U.S. Customs and Border Protection

CSMS # 66428010 - REMINDER: ACE Portal Updates to Enable Electronic Refund Enrollment Now Available – Support Call Planned for October 6 U.S. Customs and Border Protection sent this bulletin at 10/03/2025 03:26 PM EDT Cargo Systems Messaging Service CSMS # 66428010 - REMINDER: ACE Portal Updates to Enable Electronic Refund Enrollment Now Available – Support Call Planned for October 6 On September 30, 2025, U.S. Customs and Border Protection (CBP) updated the Automated Commercial Environment (ACE) Secure Data Portal (ACE Portal) to support electronic refund transactions, in accordance with Executive Order 14247 . The enhancements enable authorized trade users to provide U.S. bank information in the ACE Portal, facilitating electronic refunds from CBP via Automated Clearing House (ACH). IMPORTANT: CBP did not transition to electronic-only refunds on September 30, 2025. This ACE Portal enhancement is a preparatory step to facilitate CBP’s future transition to electronic-only refund transactions, which CBP will announce at a later date.   CBP also announced these changes in the Federal Register :: New Functionality Pertaining to Electronic Refunds in the Automated Commercial Environment on September 24, 2025. To assist users with implementing this enhancement, CBP will hold a deployment support call on October 6, 2025. Below are details on how to join the call: Monday, October 6th, 2025 1:00 to 2:00 p.m. ET Join via Microsoft Teams Desktop or Mobile App here: Join the meeting now For more information about the enhancements, review the Information Notice for Trade Users . Update your subscriptions, modify your password or e-mail address, or stop subscriptions at any time on your Subscriber Preferences Page . You will need to use your e-mail address to log in. If you have questions or problems with the subscription service, please contact subscriberhelp.govdelivery.com . This service is provided to you at no charge by U.S. Customs and Border Protection . Privacy Policy | GovDelivery is providing this information on behalf of U.S. Department of Homeland Security, and may not use the information for any other purposes. Powered by Privacy Policy | Cookie Statement | Help

Frequently asked questions

What is CSMS 66428010?

CSMS 66428010 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "REMINDER: ACE Portal Updates to Enable Electronic Refund Enrollment Now Available – Support Call Planned for October 6". CSMS bulletins are the operational instructions CBP issues to brokers, importers, and ACE filers covering rate changes, system updates, scope guidance, and other day-to-day customs-operations changes.

When was CSMS 66428010 published?

CBP published CSMS 66428010 on October 3, 2025. The bulletin's instructions are typically operative as of the publication date unless the body specifies a different effective date.

Is the CBP CSMS the legally binding instruction?

Yes — for at-the-border filing and entry collection. CSMS messages translate Commerce's Federal Register determinations into operational CBP instructions that ACE/ACS systems and brokers execute. The Federal Register notice is the underlying legal authority; the CSMS is the operational implementation. Both should be read together when reconciling a rate or scope change.

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