What does ACE error F883 mean?

F883 means PSC NOT ALLOWED TO MODIFY IEEPA HTS. U.S. Customs and Border Protection added the validation to prevent a Post Summary Correction from being submitted for a Foreign Trade Zone Entry Type 06 when the PSC modifies an International Emergency Economic Powers Act HTS code in any way. CBP deployed the rule to the ACE certification and production environments on August 21, 2026.

Is F883 a CAPE Declaration validation error?

No. F883 appears in the ACE CATAIR Entry Summary Error Dictionary and applies to a Post Summary Correction for an FTZ Entry Type 06. It is not one of the CAPE entry-level errors returned after a CAPE Declaration. A filer should identify which transaction produced the message before deciding whether to correct a PSC, a CAPE Declaration, or the underlying entry data.

Can a filer use a PSC to request an IEEPA refund on an FTZ Type 06 entry?

No. CBP's CAPE guidance says filers may not initiate an IEEPA duty refund request through a PSC. Eligible refund requests are submitted through CAPE. F883 adds a narrower restriction for FTZ Entry Type 06 by preventing a PSC that modifies the IEEPA HTS. A PSC for another issue should be evaluated before CAPE filing and may still face other ACE validations.

What should an importer do after receiving F883?

Stop resubmitting the same PSC, confirm that the entry is Type 06, identify every IEEPA Chapter 99 line the correction would change, and ask the filing broker or assigned CBP Client Representative to review the transaction. CBP directs technical questions to the Client Representative and policy concerns to the Entry Summary Accounts and Revenue Division at esar@cbp.dhs.gov.

Does F883 extend a CAPE or protest deadline?

No. An ACE rejection does not extend CBP's CAPE eligibility windows or the generally applicable 180-day protest period measured from liquidation. Importers should keep the protest deadline under review while the broker and CBP resolve the PSC issue. Finally liquidated entries may require case-specific Court of International Trade advice.

F883 IEEPA PSC Error for FTZ Type 06

U.S. Customs and Border Protection (CBP) has added a targeted ACE validation for Foreign Trade Zone (FTZ) Entry Type 06 corrections. Error F883: PSC NOT ALLOWED TO MODIFY IEEPA HTS prevents a filer from submitting a Post Summary Correction (PSC) when the correction modifies an International Emergency Economic Powers Act (IEEPA) HTS code in any way.

This is a narrow rule, but it matters because a rejected PSC, a rejected Consolidated Administration and Processing of Entries (CAPE) Declaration, and an ineligible refund request require different responses. This guide explains what CBP published, how F883 fits into the refund workflow, and which deadlines continue running while the issue is reviewed.

F883 FTZ Type 06 IEEPA PSC error and CAPE refund options

What CBP Changed

CBP published CSMS #69635410 on August 24, 2026. The message says the agency updated the ACE CATAIR Entry Summary Error Dictionary to version 52 and added this validation:

F883: PSC NOT ALLOWED TO MODIFY IEEPA HTS

The rule prevents a PSC for an FTZ Entry Type 06 if the IEEPA HTS is modified in any way. CBP deployed it to both the certification and production environments on August 21, 2026. The official ACE CATAIR Error Dictionary page provides the current version of the underlying entry-summary error reference.

CBP’s notice does not create a new duty rate, CAPE phase, or refund entitlement. It changes what ACE will accept in a specific correction transaction.

F883 Is Not a CAPE Declaration Error

The transaction type is the first distinction to make:

What you submitted	Where the error belongs	What F883 tells you
PSC for an FTZ Entry Type 06	ACE Entry Summary / CATAIR	The PSC attempted to modify an IEEPA HTS code
CAPE Declaration CSV	CAPE file or entry validation	F883 is not the applicable CAPE error definition
Protest	ACE Protest workflow	F883 does not decide whether the protest is timely or valid
CIT plaintiff submission	Court-ordered reliquidation process	Follow counsel and CBP instructions for the covered entries

Our CAPE validation-error guide explains the separate file-level and entry-level messages returned by CAPE. If ACE accepted the CSV but removed one or more entries, use the Accepted with Error(s) guide before rebuilding the declaration.

Why the General “File a PSC First” Advice Now Needs an FTZ Exception

CBP has previously instructed filers to complete a PSC needed for another entry-summary issue before submitting a CAPE Declaration. Once a CAPE Declaration is accepted, a PSC cannot be used to initiate the IEEPA refund or revise the accepted entry through that route. Source: CBP CSMS #68340863.

For ordinary entries, a PSC may still be the appropriate way to correct an expired base HTS, a missing related HTS, or another non-IEEPA issue before CAPE. F883 creates a specific limitation for FTZ Entry Type 06: do not assume that a PSC may change the IEEPA Chapter 99 line simply because a broader CAPE troubleshooting guide recommends a PSC for another HTS problem.

The official notice addresses PSCs that modify the IEEPA HTS. It does not say that every unrelated Type 06 correction is automatically acceptable. Other ACE rules and error codes can still apply, so the filing broker should review the complete PSC rather than changing one line and repeatedly retransmitting it.

What To Do After Receiving F883

1. Stop Resubmitting the Same PSC

Repeated transmission will not remove a production validation. Save the rejection message, transaction timestamp, entry number, filer code, and the version of the PSC that produced F883.

2. Confirm the Entry and HTS Lines

Verify that the entry is Type 06 and identify every Chapter 99 IEEPA line affected by the proposed correction. Compare the original entry summary, the proposed PSC, and the IEEPA duty amount. The FTZ and bonded warehouse refund guide explains why Type 06 entries can require admission-status and withdrawal-level analysis.

3. Separate the Refund Request From the Correction

Do not use a PSC to request the IEEPA refund itself. Determine whether the entry is eligible for an active CAPE lane and whether a non-IEEPA correction is still needed before CAPE filing. Phase 2 currently accepts certain reconciliation-flagged Entry Types 01, 02, and 06 where no Type 09 reconciliation entry is on file, subject to the other CAPE rules.

Use the CAPE filing guide to check the declaration path, but do not upload an entry merely to test whether CAPE will accept it.

4. Escalate Through the Correct Channel

CBP directs technical questions about F883 to the filer’s assigned Client Representative. Questions or concerns may also be directed to the Entry Summary Accounts and Revenue Division at esar@cbp.dhs.gov. Provide the rejection details without emailing sensitive banking credentials or other unnecessary confidential information.

For a material FTZ portfolio, coordinate the broker, FTZ operator, classification team, and trade counsel. The correct response may depend on whether the proposed PSC changes an IEEPA line, another duty line, the base classification, or reconciliation data.

5. Protect Independent Deadlines

An F883 rejection does not pause liquidation, CAPE eligibility rules, or the generally applicable 180-day protest period under 19 USC § 1514. Review the liquidation date and consider a protective protest where that remedy remains available. Our IEEPA protest guide explains the filing framework.

If the entry is finally liquidated and outside the protest period, obtain case-specific advice about the Court of International Trade. CAPE Phase 3 is temporarily delayed and, according to CBP’s August 25 declaration, covers finally liquidated entries filed by plaintiffs for which the court has ordered reliquidation. It is not a general substitute for deadline review.

How F883 Fits With the Current CAPE Status

F883 does not mean CAPE Phase 1 or Phase 2 has stopped accepting all Type 06 entries. The new validation applies to a PSC that modifies an IEEPA HTS on an FTZ Type 06 entry. CAPE eligibility remains dependent on the entry’s liquidation status, reconciliation posture, prior declaration history, filer relationship, and other validations.

Before taking action, classify the problem correctly:

PSC blocked by F883: review the proposed IEEPA HTS change with the broker and CBP.
CAPE file rejected: correct the CSV or filer relationship shown in the validation result.
CAPE entry rejected: review the entry-specific error and resubmit only if the underlying issue can be corrected.
Protest deadline approaching: preserve the deadline independently of the technical troubleshooting.
Finally liquidated entry: obtain counsel review rather than assuming a future CAPE phase will restore an expired remedy.

CBP may revise the CATAIR dictionary or publish additional FTZ instructions. Check the current official documents before retransmitting a correction.

Source Notes and Disclaimer

Primary sources: CBP, CSMS #69635410, August 24, 2026; CBP, ACE CATAIR Error Dictionary, version 52; and CBP, CSMS #68340863, April 2026.

CAPE Portal Guide is not a law firm, customs broker, or government agency. This article provides educational information and does not guarantee that CBP will accept a correction, declaration, protest, or refund request.

If F883 affects a material FTZ refund portfolio, request a free assessment and we will connect you with a vetted trade-law professional who can coordinate the CAPE, protest, and CIT options with your broker.