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What changed at U.S. Customs?
Every message from the CBP Cargo Systems Messaging Service (CSMS), with a plain-English summary and Allied CHB's position. We add new messages every hour.
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ACE production maintenance window overnight October 17 to 18, 2026
CBP announced a standard invasive maintenance window for ACE Production. It runs from 10:00 p.m. ET on Saturday, October 17, 2026, to 4:00 a.m. ET on Sunday, October 18, 2026.
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ACE may be unavailable during this window, so we plan filings around it. Clients do not need to act.
ACE certification environment maintenance on October 14, 2026, 5:00 to 8:00 pm ET
CBP announced an invasive maintenance window for the ACE Certification Standard environment. The window runs on October 14, 2026, from 5:00 pm to 8:00 pm ET.
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This maintenance affects the ACE certification (test) environment, not live filings, so we expect no effect on client entries. Clients do not need to act.
ACE Certification environment down for extended maintenance on October 17, 2026
CBP announced an out of cycle extended invasive maintenance window for the ACE Certification environment. The window runs on October 17, 2026, from 8:00 a.m. to 9:00 p.m. ET.
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This maintenance affects the ACE Certification (test) environment, not the production system we use to file entries. Clients do not need to act.
CBP posts updated ACE development and deployment schedule
CBP announced that an updated ACE Development and Deployment Schedule is now available on CBP.gov. CBP says the schedule is notional and subject to change. CBP directs readers to CBP.gov/ACE for the most up-to-date information on ACE deployments.
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This is an information notice and does not change the entries we file today. Clients do not need to act.
ACE Portal adds email or text verification for ACH refund changes from October 10
CBP will require email or SMS verification for ACH refund information changes in the ACE Portal beginning October 10, 2026. Authorized users who add or modify ACH refund information in an importer sub-account will receive a security token by email, with an option for SMS. The change will not complete without the token. Other authorized users on the sub-account can choose to receive email or SMS alerts after any ACH refund change.
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This change affects importers who manage their own ACH refund information in their ACE Portal importer sub-account. It does not change how we file entries. If you expect CBP refunds, including IEEPA refunds, make sure the email and phone details on your ACE Portal account are current so you can receive the token. Consider enabling change alerts for other authorized users on your sub-account.
ACE maintenance on October 8, 2026 from 5:00 to 7:00 a.m. ET may delay responses
CBP announced standard invasive maintenance on ACE Production from 5:00 a.m. to 7:00 a.m. ET on Thursday, October 8, 2026. During this window, filers may see delays in receiving response notifications.
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We expect possible delays in ACE responses for filings sent during this two-hour window. Clients do not need to act.
ACE scheduled maintenance overnight October 10 to 11, 2026
CBP announced an ACE Production standard invasive maintenance window. It runs from 10:00 p.m. ET Saturday, October 10, 2026, to 4:00 a.m. ET Sunday, October 11, 2026.
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ACE may be unavailable during this window, so filings we submit then may be delayed until it ends. Clients do not need to act, but should tell us early about any shipments arriving that night.
CBP holds support call today on the Entry Type 13 mail test in ACE
CBP will hold a Post-Deployment Support Call today, October 7, 2026, at 1:00 p.m. ET on Microsoft Teams. The call covers the ACE enhancements that implemented the new Entry Type 13 Test for processing international mail shipments (INT-057 and CBP-290). CBP refers readers to its Information Notice for details on these deployments. Questions go to CBP's CREM or ESAR divisions, and technical questions go to the assigned Client Representative.
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This is an information call, and clients do not need to act. We file mail entries, including entry type 13, and the call does not change how we file them. Shippers and postal operators who want to hear CBP's explanation can join using the details in the message. Clients with questions about their mail shipments can ask us to review them.
ACE certification environment maintenance on October 7, 2026, 5:00 to 8:00 p.m. ET
CBP announced an invasive maintenance window for the ACE certification standard environment. It runs on October 7, 2026, from 5:00 p.m. to 8:00 p.m. ET.
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This maintenance affects the ACE certification (test) environment, not live filings. Clients do not need to act.
ACE scheduled maintenance overnight October 3 to October 4, 2026
CBP announced ACE Production Standard Invasive Maintenance. It runs from 10:00 p.m. ET Saturday, October 3, 2026, to 4:00 a.m. ET Sunday, October 4, 2026.
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ACE may be unavailable during this window, so we plan filings around it. Clients do not need to act.
CBP updates ACE filing guide with fiscal year 2027 COBRA user fees from October 1, 2026
CBP updated the ACE CATAIR Entry Summary Create/Update chapter to include the Fiscal Year 2027 Customs COBRA User Fees. The adjusted fee amounts and limitations take effect October 1, 2026. The updated chapter is posted under the Chapters: Current Capabilities tab. Technical questions go to the assigned Client Representative, and other inquiries go to CBP's Entry Summary Accounts & Revenue Division.
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We apply the adjusted COBRA user fee amounts and limitations to the entry summaries we file from October 1, 2026. The message does not list the new amounts, so clients may see different user fees on entries filed from that date. Clients do not need to act. Ask us if you have questions about the fees on a specific entry.
CBP moves Entry Type 13 mail test guides from draft to current ACE chapters
CBP implemented the Entry Type 13 (ET13) test for U.S. mail processing in ACE on September 22, 2026. CBP moved the related Cargo Release and Entry Summary implementation guides from the draft section of its CATAIR page to the current sections. The moved documents include the PGA Flag Enforcement Table, the Prior Notice stand-alone filing guide and the Entry Summary Error Dictionary.
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This is a technical update for software developers and filers who transmit Entry Type 13 data to ACE. We file mail entries, including entry type 13, and we follow the current CATAIR guides for them. Clients do not need to act because of this message. Clients who ship by mail can ask us how Entry Type 13 applies to their shipments.
ACE Certification test environment down for maintenance on September 30
CBP will run an extended maintenance window for the ACE Certification environment on September 30, 2026. The window runs from 5:00 p.m. to 9:00 p.m. ET. The Certification environment is used for testing, not for live filings.
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This maintenance affects only the ACE test environment, not the live entries we file for clients. Clients do not need to act.
ACE production maintenance on September 26 to 27, 2026
CBP scheduled standard invasive maintenance on the ACE production environment. It runs from 10:00 p.m. ET Saturday, September 26, 2026 to 4:00 a.m. ET Sunday, September 27, 2026.
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We plan urgent filings outside this window. Clients do not need to act.
ACE certification environment maintenance on September 23, 2026
CBP scheduled standard invasive maintenance on the ACE certification environment. The window runs from 5:00 p.m. to 8:00 p.m. ET on September 23, 2026.
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The certification environment is for tests, not for live filings, so this window does not affect the entries we file. Clients do not need to act.
ACE ocean manifest back-end update goes to production on October 24, 2026
CBP modernizes the ACE ocean, rail and air manifest systems in several releases. Release 3 (INT-062) is a technical migration of back-end functions for the ocean mode and does not change the ACE user experience or EDI behavior. It is now in the ACE certification environment, where software developers can send test transmissions. CBP schedules deployment to production for October 24, 2026.
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CBP says this release does not change the user experience or EDI behavior, so the entries we file do not change. Clients do not need to act.
CBP corrects the Section 338 exemption number in ACE error F884 to 9903.03.15
CBP corrected CSMS 69915227: the exemption HTS number in ACE error F884 is 9903.03.15. The updated ACE CATAIR Error Dictionary V53 is on CBP.gov. Error F884 rejects exemption HTS 9903.03.15 for Section 338 when the line has no appropriate dutiable Chapter 99 number. The error went into the certification and production environments on August 26, 2026.
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This error affects only entry lines that claim the Section 338 exemption under 9903.03.15. We report that exemption only with the dutiable Chapter 99 number that the line requires, so clients do not need to act.
ACE production maintenance on September 19 to 20, 2026
CBP scheduled standard invasive maintenance on the ACE production environment. It runs from 10:00 p.m. ET Saturday, September 19, 2026 to 4:00 a.m. ET Sunday, September 20, 2026.
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We plan urgent filings outside this window. Clients do not need to act.
ACE production maintenance on September 19 to 20, 2026
CBP scheduled standard invasive maintenance on the ACE production environment. It runs from 10:00 p.m. ET Saturday, September 19, 2026 to 4:00 a.m. ET Sunday, September 20, 2026.
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We plan urgent filings outside this window. Clients do not need to act.
CBP posts draft ACE error codes for the new mail entry type 13 test
CBP posted a draft ACE CATAIR Error Dictionary V54 in the Future Capabilities section of CBP.gov. All updates support the new Entry Type 13 test. Nine new errors cover manifest components, the final delivered-to party and address, unknown ZIP codes and the dutiable mail fee. The update renames error B49 to "PSC NOT ALLOWED - CANNOT BE INFORMAL/MAIL" and updates 11 current errors.
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These draft errors apply to the entry type 13 mail entries that we file. Under these errors, ACE rejects a type 13 entry that lacks the final delivered-to party, its complete address or a known ZIP code. Mail shippers should send us these data for each shipment. The message does not give a production date for these errors.
ACE error F884 rejects Section 338 exemptions without a dutiable Chapter 99 number
CBP posted an updated ACE CATAIR Error Dictionary V53 on CBP.gov. It adds error F884, EXEMPT HTS NOT ALLOWED FOR SECTION 338. The error rejects a Section 338 exemption HTS number on a line that has no appropriate dutiable Chapter 99 number. The error went into the certification and production environments on August 26, 2026.
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This error affects only entry lines that claim a Section 338 exemption. We report the exemption only with the dutiable Chapter 99 number that the line requires, so clients do not need to act.
ACE applies FY27 user fees from October 1, 2026 and adds entry type 13 changes
CBP posted ACE CATAIR Entry Summary Create/Update V110 with the new FY27 COBRA user fees. The new fees apply from October 1, 2026, also to summaries pre-filed earlier when the entry date is October 1 or later. Draft V111 adds ten changes and three new Input 23-Record requirements for Entry Type 13. The type 13 updates are in the certification environment, with production set for September 22, 2026.
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We apply the FY27 user fees to the entries we file with an entry date on or after October 1, 2026. The type 13 changes apply to the mail entries we file under the test. Clients do not need to act.
ACE certification environment maintenance on September 16, 2026
CBP scheduled standard invasive maintenance on the ACE certification environment. The window runs from 5:00 p.m. to 8:00 p.m. ET on September 16, 2026.
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The certification environment is for tests, not for live filings, so this window does not affect the entries we file. Clients do not need to act.
CBP support call on the entry type 13 mail test set for September 15, 2026
CBP scheduled a pre-deployment support call for Tuesday, September 15, 2026 at 1:00 p.m. ET on Microsoft Teams. The call covered the ACE changes for the new Entry Type 13 test for international mail shipments (INT-057 and CBP-290). CBP refers readers to its Information Notice on the Entry Type 13 test in ACE for U.S. mail processing.
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The entry type 13 test affects the mail entries we file, but this call needs no action from clients.
CBP adds SMS option for ACE Portal login authentication
CBP enhanced ACE Portal login security on September 12, 2026, by adding SMS as a multifactor authentication option. After logging in via email, users can register a mobile phone number to receive login tokens by text instead. The feature is optional and users can manage or remove it under Manage Preferences.
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This is an optional login security feature for ACE Portal accounts and does not change how we file entries. Clients do not need to do anything, but any of our staff or client users with their own ACE Portal logins may choose to register a phone number for SMS authentication.
CBP's ACE user survey closed September 11, 2026
CBP asked ACE trade community users to complete a voluntary, anonymous satisfaction survey about ACE capabilities and user experience. The survey closed at 11:59 p.m. ET on September 11, 2026.
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This survey is now closed and required no filing changes on our part. It did not affect how we file entries for clients, and no action was needed then or now.
CBP to validate export ITN numbers in ACE starting October 8, 2026
CBP deployed an enhancement to ACE that validates the Internal Transaction Number (ITN) for Electronic Export Information submitted through the Document Imaging System (DIS), by EDI or email. The enhancement is live in the Certification Environment now and moves to Production on October 8, 2026. Submissions with an invalid or mismatched ITN will be rejected with an error message. CBP also updated the ACE DIS Implementation Guide to reflect these changes.
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This notice concerns export filings and the DIS system rather than the import entries we file. We will make sure any ITN data we submit through DIS matches the corresponding AES export transaction exactly once this goes live on October 8, 2026. Clients who submit export documentation through DIS should confirm their ITN entries are accurate and properly formatted before that date. Clients who only import do not need to act.
CBP held ACE maintenance window on September 12-13, 2026
CBP announced an ACE Production Standard Invasive Maintenance window from 10:00 p.m. ET on Saturday, September 12, 2026, to 4:00 a.m. ET on Sunday, September 13, 2026. The message did not describe which ACE functions were affected. This notice applied to filers and other ACE users during that maintenance period.
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This was a routine, one-time maintenance window that has already passed. It does not affect entries filed today, and clients do not need to take any action regarding this notice.
CBP's 2026 ACE user satisfaction survey closed September 11
CBP asked ACE trade community users to complete a voluntary, anonymous satisfaction survey about ACE. The survey covered users' experience with ACE's capabilities. CBP stated the survey would remain open through 11:59 p.m. ET on September 11, 2026.
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This survey concerned ACE users generally and did not require any action on entries we file. The survey window has already closed, so no action is possible now. Clients do not need to do anything about this notice.
CBP posts updated ACE development and deployment schedule
CBP announced on September 4, 2026 that an updated ACE Development and Deployment Schedule is posted on CBP.gov. CBP describes the schedule as notional and subject to change. The notice directs readers to CBP.gov/ACE for the latest deployment information.
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This notice concerns CBP's internal ACE system planning and does not require action from our clients. We monitor CBP.gov/ACE for changes that could affect entry filing and will advise clients if any deployment impacts the entries we file.
The summaries and positions are general information, not legal advice. Always check the official CBP message, which each page links to.
Does a change affect your entries?
Call (908) 291-8001 or email info@alliedchb.com