Most money that importers lose to Customs is lost not to penalties but to silence. An entry liquidates at a rate the importer disputes, or with a tariff that was later held unlawful, or at a value the importer could have supported at a lower figure, and nobody files a protest. After 180 days the liquidation is final, and the money is gone.
Liquidation starts the clock
Liquidation is CBP’s final computation of the duties on an entry. It usually happens 314 days after entry, and CBP can extend it for up to three more years when it needs more information. The importer sees it in ACE and, for most entries, on a courtesy notice. The date of liquidation is the date that matters.
Under 19 U.S.C. § 1514, a protest must be filed within 180 days after the date of liquidation, or after the date of the decision being protested if it is not a liquidation. There is no extension. A protest filed on day 181 is void.
What can be protested
Section 1514 lists the decisions that a protest can challenge: the appraised value, the classification and rate of duty, charges and exactions, the exclusion of merchandise from entry, the liquidation or reliquidation of an entry, the refusal to pay a drawback claim, and the refusal to reliquidate under 19 U.S.C. § 1520(d). In practice the common protests are classification, valuation, origin and preference claims, and the application of additional duties such as Section 232, Section 301 and antidumping deposits.
Decisions that are not CBP’s cannot be protested. A Commerce Department antidumping margin, for example, is challenged at the Court of International Trade under a different jurisdictional provision, not by protest. And as the IEEPA litigation showed, the legality of a presidential tariff is not something CBP can rule on, which is why those challenges went directly to the court.
The form and what goes in it
The protest is CBP Form 19, filed in ACE. It must identify each entry, each decision protested, and the nature of the objection, with enough specificity that CBP can understand the claim. A protest that says “classification is wrong” without saying what the correct classification is and why may be denied as non-specific.
Supporting documents go with it: the commercial invoices, the product literature, a laboratory report, a ruling letter, a certificate of origin. The protest can be amended until the 180 days run out, but not after, so a thin protest filed to meet the deadline must be supplemented in time.
Entries can be grouped on one protest if they involve the same merchandise and the same issue at the same port. Different ports mean different protests.
Further review
A protest is decided by the port or Center that liquidated the entry. If the question is one the port has already decided against the importer, or involves a legal question of first impression, the importer can request further review under 19 C.F.R. § 174.23 and have the protest decided by CBP’s Office of Regulations and Rulings at headquarters. The application for further review is filed with the protest and must explain why review is justified. It is the route for classification disputes that matter beyond one entry.
Accelerated disposition
CBP has two years to decide a protest under 19 U.S.C. § 1515(a), and it can take all of it. An importer that needs a decision sooner, usually because it wants to get to court, can request accelerated disposition under § 1515(b) after the protest has been pending 90 days. If CBP does not act within 30 days of that request, the protest is deemed denied, and the importer can file suit.
After denial
A denied protest can be challenged at the U.S. Court of International Trade, which has exclusive jurisdiction over such actions under 28 U.S.C. § 1581(a). The summons must be filed within 180 days after the date of the denial. Two conditions apply, and both catch importers.
First, under 28 U.S.C. § 2637(a), all liquidated duties, charges and exactions on the entries must have been paid before the action is commenced. An importer that protested and withheld payment cannot get into court until it pays. The court has applied this rule strictly.
Second, the court reviews the protest claim as presented to CBP. Issues raised for the first time at the court are generally not heard. That is why the protest must be complete, and why the person drafting it should be thinking about the court even when the hope is that the port will grant it.
What this means in practice
Watch liquidations, not just entries. Many compliance teams track the day cargo arrives and never look at ACE again. Set a review at liquidation for any entry with a disputed classification, a pending ruling request, an additional duty whose legality is being litigated, or a preference claim that was denied. File the protest with the evidence, not before it. Ask for further review when the issue is bigger than the entry. And if the amount justifies it, plan for the court from the beginning, because the 180 days that begin at liquidation are followed by another 180 that begin at denial, and no one extends either of them.