The CBP Form 29 — the Notice of Action — looks like a single form, but it is functionally two different notices wearing the same uniform. One version proposes an action CBP intends to take and gives the importer an opportunity to push back. The other version informs the importer that an action has already been taken and that the only remaining recourse is a formal protest. The procedural posture between the two could not be more different, and importers who misread which one they have received routinely miss the only window they had to fix the problem.
This article explains both versions of the Form 29, the deadlines that apply to each, the response strategies that work for each, and how the Form 29 fits into the larger sequence of CBP enforcement that often begins with a Form 28 Request for Information and may end in a 19 U.S.C. § 1592 penalty proceeding or a protest before the Court of International Trade.
What a Form 29 Is
CBP Form 29 is the form by which CBP communicates a change — proposed or already taken — to the way a specific import entry will be treated. The change may involve reclassification of merchandise, revaluation, denial of a Free Trade Agreement claim, assessment of antidumping or countervailing duties, application of a different country of origin determination, or any other adjustment that affects the duties or compliance status of the entry.
The Form 29 is typically issued by the same Import Specialist who handled any earlier Form 28 inquiry, and it usually follows a Form 28. That is not always the case, however. CBP can issue a Form 29 without first issuing a Form 28 if the agency has enough information on its own to act, or if the Form 28 inquiry never produced an adequate response. The absence of a prior Form 28 is not itself a procedural defect.
The critical detail on every Form 29 is which box is checked at the top: “Action Proposed” or “Action Taken.” That single checkbox determines everything about how to respond.
Action Proposed: The 20-Day Window
When the Form 29 indicates “Action Proposed,” CBP is telling the importer what change it intends to make and giving the importer a chance to argue against it before the change is finalized. The standard response window is 20 days from the date of the notice. If the importer responds within that period and persuades CBP that the proposed action is wrong, the action is not taken and the entry liquidates as originally filed. If the importer does not respond, or responds unpersuasively, CBP proceeds with the proposed action and the entry is liquidated as adjusted.
The Action Proposed window is the most important opportunity an importer has to influence the outcome of an entry without resorting to formal protest litigation. Several things matter about how to use it.
- The standard is persuasion, not negotiation. A Form 29 response is a legal argument — what the correct classification, valuation, or origin treatment is, supported by the HTSUS, the valuation regulations at 19 C.F.R. Part 152, the relevant FTA, prior CBP rulings, court decisions, or whatever authority applies. It is not a request for leniency or an explanation of business hardship. CBP’s Import Specialists evaluate Form 29 responses on the legal and factual merits.
- Documentary support matters as much as the argument. A response asserting that the merchandise is classifiable under one heading rather than another needs the technical documentation, product specifications, and any prior binding rulings that support the position. A response on valuation needs the contractual documentation, payment records, and any related-party analysis that supports the declared value. An assertion without documentation is rarely persuasive.
- The response can request additional time. If 20 days is not enough to produce a complete response — particularly when the underlying issue requires technical input from a foreign producer or a substantive legal analysis — a short written request for an extension should be submitted to the issuing officer well before the deadline. Extensions are generally granted for reasonable cause.
- Concessions in the response are admissions in the file. The same concerns that apply to Form 28 responses apply with greater force at Form 29. Language conceding that the importer was wrong about classification, that the broker made an error, or that compliance procedures should have been better all become part of the record CBP relies on for any subsequent penalty determination under 19 U.S.C. § 1592.
If the response succeeds, CBP withdraws the proposed action and the entry liquidates as originally filed. If the response fails, CBP issues a second Form 29 marked “Action Taken,” and the procedural posture changes entirely.
Action Taken: The Decision Is Final
When the Form 29 indicates “Action Taken,” CBP is informing the importer that the change has been made. The entry will be liquidated as adjusted. There is no further opportunity to argue with the Import Specialist. The case has moved into a different procedural track.
The importer’s recourse from an Action Taken notice is to await the liquidation notice and then file a protest under 19 U.S.C. § 1514 within 180 days of liquidation. The protest is filed with CBP, decided by CBP, and — if denied — can be challenged at the U.S. Court of International Trade upon timely payment of duties and filing of a summons. This is the formal path: legal arguments, documentary evidence, and ultimately judicial review if necessary.
An Action Taken Form 29 is not the end of the road, but it is a different and more procedurally demanding road than the one available before the action was taken. The protest deadline is jurisdictional. Missing it forecloses challenge entirely, regardless of the merits.
Why the Distinction Matters in Practice
The most common Form 29 mistake importers make is reading the form too quickly and misidentifying which version it is. The two notices look almost identical: same form number, same general layout, same Import Specialist signature. The only meaningful difference is the box checked at the top. An importer who treats an Action Proposed notice as if it were Action Taken — and waits passively for liquidation — has just allowed the 20-day window to expire and lost the opportunity to head off the change at the lowest-cost stage. An importer who treats an Action Taken notice as if it were Action Proposed — and writes a substantive response to the Import Specialist instead of preparing a protest — has wasted the 180-day protest window on a procedurally meaningless letter.
Reading the form carefully on the day it arrives, identifying which box is checked, and calendaring the appropriate deadline immediately is the first step in every Form 29 case. Twenty days passes quickly, and the consequences of missing it are not recoverable.
What a Form 29 Typically Proposes
The substantive actions Form 29 notices most commonly propose or take include:
- Reclassification. Moving the merchandise from the HTSUS subheading declared on the entry to a different subheading, usually one with a higher duty rate. Reclassification is the most common Form 29 action and is frequently driven by a Form 28 inquiry that produced the technical documentation CBP used to reach a different conclusion.
- Revaluation. Adjusting the customs value of the merchandise upward to account for assists, royalties, commissions, related-party adjustments, or other additions to value the importer did not include. Revaluation cases can scale across many entries and produce large duty assessments.
- Denial of FTA preference. Concluding that the goods do not qualify as originating under USMCA, KORUS, CAFTA-DR, or another agreement, and assessing the regular duty rate instead of the preferential rate. These cases frequently follow origin verification inquiries on Form 28.
- AD/CVD assessment. Concluding that the merchandise is within the scope of an existing antidumping or countervailing duty order and assessing the applicable AD/CVD rate. These actions can produce extremely large assessments because AD/CVD rates are often a substantial percentage of declared value, and the assessments apply to every entry within the scope.
- Country of origin change. Concluding that the country of origin marked or declared on the entry is incorrect, with consequences for duty rate, AD/CVD applicability, marking compliance, and Section 232 or Section 301 tariff treatment.
- Section 232 or Section 301 application. Concluding that the merchandise is subject to additional tariffs under Section 232, Section 301, or the IEEPA-based tariffs imposed in 2025, where the importer did not declare those tariffs on the original entry.
The Penalty Risk Behind a Form 29
A Form 29 by itself assesses additional duties on a specific entry, but it does not impose a penalty. The penalty risk lives one step beyond the Form 29. When CBP concludes that the original entry was filed with negligence, gross negligence, or fraud — that is, that the importer failed to exercise reasonable care in declaring the classification, value, origin, or other particulars affecting duty liability — the matter can be referred to Fines, Penalties and Forfeitures for a formal pre-penalty proceeding under 19 U.S.C. § 1592.
The 19 U.S.C. § 1592 penalty structure scales with the level of culpability. Negligence carries a maximum penalty of two times the loss of revenue, or 20 percent of dutiable value if no duties were lost. Gross negligence carries up to four times the loss of revenue, or 40 percent of dutiable value. Fraud carries the maximum: a penalty equal to the full domestic value of the merchandise. The factual record on which CBP determines culpability is built largely from the Form 28 response, the Form 29 response, and any communications in between. This is one of the reasons why concessions in those responses are so consequential — they shape the file CBP relies on to decide whether negligence, gross negligence, or no penalty at all is the right characterization.
If the underlying issue involves potential exposure across many entries, the importer should consider whether filing a prior disclosure under 19 U.S.C. § 1592(c)(4) is appropriate before the matter escalates. A prior disclosure filed before CBP commences a formal investigation captures dramatically reduced penalty rates: one times the loss of revenue for fraud, the interest alone for negligence and gross negligence. That option closes the moment CBP’s investigation is formally commenced, and a Form 29 marked Action Taken often signals that the window has narrowed considerably.
Building a Persuasive Form 29 Response
An effective response to an Action Proposed Form 29 has four components.
The legal argument. A clear statement of why CBP’s proposed action is incorrect, supported by the relevant statutory provisions, regulations, HTSUS chapter and section notes, GRIs, prior binding rulings, and court decisions. The argument should engage with whatever rationale CBP appears to be relying on, not present a parallel argument that does not address CBP’s reasoning.
The factual record. The documentation that establishes the facts on which the legal argument relies — product specifications, technical drawings, commercial invoices, contractual agreements, FTA certificates, foreign producer affidavits, and any other primary records. The factual record should be complete, organized, and tied directly to the legal argument it supports.
The exhibits and authorities. Copies of binding rulings, court decisions, or other authorities cited in the legal argument should be attached, not just referenced. Import Specialists are not going to track down outside material to evaluate the response. Everything should be in the package.
The cover letter. Brief, professional, factual. It identifies the entry, the Form 29, and the contents of the response. It does not narrate the importer’s history, characterize compliance practices, or make any statement that could be read as an admission. The substance lives in the legal argument and the factual record, not in the cover letter.
After the Form 29
If the Action Proposed response succeeds, the entry liquidates as filed and the matter is over — at least for that entry. CBP may still pursue the same issue on related entries, and the importer should consider whether to file protests on already-liquidated entries within the 180-day window if those entries were treated the same way the Form 29 proposed.
If the response does not succeed, CBP issues an Action Taken Form 29 and the entry is liquidated as adjusted. The importer has 180 days from liquidation to file a protest. Protests are decided by CBP at the port and frequently denied. A denied protest can be challenged at the Court of International Trade if the importer pays the assessed duties and files a summons within the statutory window.
If the matter has escalated to a formal penalty proceeding under 19 U.S.C. § 1592, the importer will receive a pre-penalty notice from FP&F separately. The pre-penalty notice triggers its own response window, its own evidentiary record, and its own set of mitigation considerations — see our pages on penalty defense and mitigation and the notice of liquidated damages for the related procedures.
Received a CBP Form 29?
If CBP has issued a Form 29 on one of your entries, read it carefully on the day it arrives. Identify whether it is Action Proposed or Action Taken. Calendar the applicable deadline — 20 days for Action Proposed, 180 days from liquidation for protest if Action Taken — and begin preparing the response immediately.
Great Lakes Customs Law has handled Form 29 responses and protests across classification, valuation, origin, AD/CVD, and tariff applicability disputes. Jason Wapiennik works directly with importers and their customs brokers to produce responses that engage the legal merits, build a complete documentary record, and avoid the admissions that turn a duty dispute into a penalty case.
For context on the inquiry that often precedes a Form 29, see our companion article on the CBP Form 28 Request for Information. For the broader enforcement framework, see our pages on customs violations, 19 U.S.C. § 1592 penalties, and protest filing. To discuss a specific Form 29 directly, call us at (734) 855-4999, send a text message, or reach us on WhatsApp. You can also contact us online for a free consultation.