USMCA certification of origin: what CBP checks against the line that claimed S, and what a failed claim costs

What does a USMCA claim on an entry line commit you to?

The claim is one or two letters. 19 CFR 182.11(b) says the importer claims USMCA treatment by putting "S" or "S+" in front of the HTS subheading of each originating good on the entry summary; the Form 7501 instructions (revision 02/26) place the special program indicator in column 31, on the same line as the HTS number the rate is based on. With that prefix the importer, under 182.13(a):

• is deemed to have made a statement, based on a valid certification of origin, that the good qualifies as originating;
• is responsible for the truthfulness of the claim and of everything in the certification, including a certification the exporter or producer wrote;
• is responsible for producing supporting documents when CBP asks, or arranging for the exporter or producer to send them directly.

The certification has to be in the importer's possession when the claim is made (182.12(a)(3)). A claim made first and papered later is not a valid claim, even if the goods do qualify. This page is about claims that were made; the opposite case, qualifying goods entered without the claim, is on unclaimed USMCA preference on past entries.

What are the nine data elements, and what does each tie to on the entry?

USMCA Annex 5-A lists nine minimum data elements, and 19 CFR 182.12(a)(4) and (5) write them into US law. A certification missing one of them is not valid. The useful audit is to put each element next to the entry line it supports, because most failures are mismatches between the two, not missing paper.

Three quick mismatches find most problem lines in an entry export: an HS heading on the line that differs from the one on the certification; an entry whose date of importation falls outside the blanket period; and a producer address outside Mexico, Canada or the United States, which means the good was not produced where the certification says.

How does a CBP origin verification work?

19 CFR 182.72(a) lets CBP verify any USMCA claim, with the importer or with the exporter or producer who certified, by one or more of three means: requests for information or questionnaires, verification visits to the exporter's or producer's premises in Mexico or Canada, or any other procedure the USMCA countries agree on. CBP can also verify a material used in the good, back to the material producer (182.72(b)).

The clock, from the regulations:

1. Request or questionnaire. It states the objective and scope and identifies the good (182.73(a)). The recipient has 30 days to answer and provide the documents. Time runs from the date sent for the importer, and from confirmed receipt for an exporter or producer (182.73(e) and (f)(1)).
2. Importer notice. When CBP starts with the exporter or producer, it tells the importer that a verification has begun (182.73(c)).
3. Visit. CBP needs the exporter's or producer's written consent, requested in a notice that names the officials, the date, the location and the purpose; the company has 30 days to consent and may ask once, within 15 days, to postpone for up to 30 days (182.73(b), 182.74(a) and (b)). It may name up to two observers.
4. Intent to deny. Before a negative determination, CBP sends the preliminary results and the effective date of the denial, and gives 30 days to submit more information (182.75(c)(3)).
5. Determination. CBP issues a written determination of origin within 120 days after it has all the information it needs, or 210 days in exceptional cases (182.75(b)). A negative determination tells the exporter or producer how to protest it under 19 U.S.C. 1514(e).

While this runs, the entries usually stay open: 19 U.S.C. 1504(b) lets CBP extend liquidation when the information it needs is not available, up to four years from entry.

What does CBP ask for, and what makes it deny?

The records are the ones 19 CFR 182.15 already requires the importer to keep for five years from importation: everything showing the good qualifies, including the certification and records of transit and transshipment. In practice the questionnaire goes to the origin criterion, element 7: for a tariff-shift rule, the bill of materials with the HS classification of each non-originating material; for a regional value content rule, the cost records behind the calculation, kept under the generally accepted accounting principles of the country of production (182.72(d)); for originating materials, the supplier's own support.

182.75(c)(2) lists the grounds for denial. The ones that come from the importer's side of the file:

• the certification is not produced when CBP asks (also 182.16(a));
• the claim or certification is invalid or based on inaccurate information and was not corrected under 182.11(c);
• the importer, exporter or producer does not provide enough information to substantiate the claim, or does not answer the questionnaire;
• the producer refuses a visit or access to records or facilities;
• the good does not meet the General Note 11 rule of origin;
• the records were not kept.

Most denials do not need CBP to prove the good is non-originating. Silence, a missing record or a refused visit is enough.

What does a failed claim cost on one line?

Illustrative figures. Plastic tableware, HTSUS 3924.10.40, general rate 3.4 percent, "S" in the Special column. Product of Mexico, trucked across the border, entered September 8, 2026 with the "S" prefix. Entered value $200,000. The certification is a blanket certification from the Mexican exporter. A verification finds that the exporter cannot support the origin criterion, and CBP denies the claim.

The Section 301 row is the one that changed the stakes. USTR's action at 91 FR 47318 put 10 percent on products of Mexico (heading 9903.05.55) and of Canada (heading 9903.05.29) for goods entered from 12:01 a.m. eastern time on July 24, 2026. U.S. note 52(g) and (h) exempt products "entered free of duty under" USMCA, reported under headings 9903.05.93 and 9903.05.94. Lose the USMCA treatment and the exemption goes with it, so on a low-rate good like this one the Section 301 layer is three times the base duty.

Interest on the underpaid amount runs from the date the duty should have been deposited to liquidation (19 U.S.C. 1505(c)). And the denial is not limited to one entry: under 182.76, if the verification shows a pattern of false or unsupported representations, CBP can withhold USMCA treatment from identical goods on later entries from that importer, exporter or producer until it is satisfied. To price your own line with and without the claim on its entry date, use the duty calculator.

What should you do if you find a bad certification first?

Correct the claim yourself, because the law rewards it. 19 CFR 182.11(c) requires an importer who has reason to believe the certification is based on inaccurate information or is invalid to promptly and voluntarily correct the claim, pay the duties due and file a statement. 19 U.S.C. 1592(c)(5) and 182.13(b) then protect the importer from penalties for the incorrect claim. Under 182.124 a correction is prompt and voluntary when it is made before a formal investigation starts (as 19 CFR 162.74 defines it), or within 30 days after the importer first learns the claim was incorrect, with a statement identifying each affected entry and a tender of the lost duty then or within 30 days. Two exceptions: a fraudulent claim cannot be voluntarily corrected, and neither can later claims on the same goods made after the importer knew the first was invalid.

Without that correction, a false USMCA claim is a statement under 19 U.S.C. 1592, and 1592(d) lets CBP demand the lost duties even on liquidated entries. Prior disclosure after you find an underpayment covers the wider disclosure route. Decide the route with a licensed broker or trade counsel before filing anything.

How do you audit your own USMCA claims before CBP does?

1. Pull every line with "S" or "S+" from the entry export for the last five years, the record-keeping period in 182.15.
2. Match each line to a certification by product and date of importation. Flag lines with no certification, or with one dated after the entry, or outside its blanket period.
3. Compare the HS classification on the certification with the first six digits on the line.
4. Check the producer and exporter addresses are in a USMCA country, and that the producer named matches the manufacturer on the entry.
5. Ask each certifier for the support behind element 7 for your largest lines, the way a questionnaire would, and give them the 30 days CBP would.
6. Sort by exposure. Entries from July 24, 2026 carry the extra 10 percent if the claim fails, so they come first.

The country of origin page explains why a good can be Mexican for marking and still fail the USMCA rule, and how the merchandise processing fee is calculated covers the fee exemption a claim carries.

TariffSense reads entry summaries and broker entry exports line by line and, for each USMCA line, shows the duty stack with and without the claim on that line's entry date, so the lines where a failed certification would cost most are visible before a questionnaire arrives. The post-entry audit pillar lists the other line checks; the certifications themselves stay in your files and your supplier's.