CUSTOMS LITIGATION | 2026-10-08
The "Pay First" Rule of 28 U.S.C. § 2637: Why a California Importer Must Pay the Disputed Duties Before the Court of International Trade Will Hear Its IEEPA Refund Case
Winning an IEEPA refund in court is not just about being right. Before the Court of International Trade will hear a denied-protest case, 28 U.S.C. § 2637 requires the importer to have paid all liquidated duties on the entries in dispute. Miss that prerequisite — or the limitations clock in § 2636 — and the case is dismissed before the merits.
After the Supreme Court struck down the tariffs imposed under the International Emergency Economic Powers Act, many California importers are preparing to pursue refunds in the Court of International Trade. But the court will not reach the merits of a denied-protest refund case unless two procedural
Customs litigation rewards procedure as much as substance. The Court of International Trade is a specialized federal court with exclusive authority over most tariff disputes, and Congress attached to that authority a set of conditions a plaintiff must meet before the court can act. For IEEPA refund claims, the two most important are the payment prerequisite of § 2637 and the limitations periods of § 2636. Both are easy to satisfy with planning and fatal to ignore.
Two Doors, Two Sets of Prerequisites
Most IEEPA refund claims that reach the Court of International Trade will travel one of two routes. The ordinary route is a denied-protest case under 28 U.S.C. § 1581(a): the entry liquidates, the importer protests under 19 U.S.C. § 1514, Customs denies the protest, and the importer sues. The alternative is the residual-jurisdiction route under 28 U.S.C. § 1581(i), used for challenges to the administration of the tariff laws that do not fit the protest mold — the door through which the broad challenge to the IEEPA tariffs themselves traveled, as we explain in our article on residual jurisdiction under 28 U.S.C. § 1581(i). The prerequisites differ by route, and the "pay first" rule applies with its greatest force to the denied-protest route.
The Text of the Pay-First Rule
Section 2637(a) provides that a civil action contesting the denial of a protest under § 1581(a) may be commenced only if all liquidated duties, charges, or exactions have been paid at the time the action is filed. The requirement is categorical. It is not enough to be prepared to pay, or to dispute whether the duties were lawfully assessed; the liquidated amount must actually be paid before the summons is filed. The logic is straightforward: the protest system and the courts exist to decide whether money already collected should be returned, not to excuse payment in the first instance. An importer contesting a liquidation must put the money in before it can ask for the money back.
For IEEPA refunds, this produces a counterintuitive but unavoidable reality. An importer convinced the tariffs were unlawful must nonetheless have paid the liquidated duties on the disputed entries before it can sue to recover them under § 1581(a). The payment is the ticket to the courthouse.
Why the Rule Exists and How Courts Apply It
The payment prerequisite is jurisdictional, which means a court cannot waive it or excuse an importer’s failure to comply, however sympathetic the circumstances. The Court of International Trade and the Court of Appeals for the Federal Circuit have consistently treated § 2637(a) as a condition on the court’s power to hear the case. If the liquidated duties were not paid when the action was filed, the remedy is dismissal, and the importer generally cannot cure the defect by paying later if the limitations period has by then expired. The interaction between the payment rule and the limitations clock is therefore critical: an importer must pay and file within the window.
The Limitations Clock: § 2636
Section 2636 sets the deadlines for commencing actions in the Court of International Trade, and they vary by the jurisdictional door:
- Denied protest, § 1581(a): under § 2636(a), the action must be commenced within 180 days after the date of mailing of the notice of denial of the protest.
- Residual jurisdiction, § 1581(i): under § 2636(i), the action must be commenced within two years after the cause of action first accrues.
These periods are jurisdictional limitations, not ordinary statutes of limitations subject to equitable tolling in the usual way. An importer that misses the 180-day protest-denial window loses the § 1581(a) route; one that lets the two-year residual period run loses the § 1581(i) route. Because the two deadlines are so different, the first analytical step is always to classify the claim correctly, then calendar the right clock.
How Payment and Protest Fit Together
Satisfying § 2637 is a sequence, not a single act. The importer must have a liquidated entry, a timely protest under 19 U.S.C. § 1514, a denial of that protest, payment of all liquidated duties on the entries, and a summons filed within 180 days of the denial. Each step depends on the one before it. An importer that never filed a protest has no denial to sue on; an importer that has a denial but has not paid the liquidated duties cannot invoke the court’s jurisdiction; an importer that has paid but waited too long after the denial is time-barred. We describe the protest mechanics and the related accelerated-disposition device in our articles on the finality of liquidation under 19 U.S.C. § 1514 and accelerated disposition under 19 U.S.C. § 1515(b).
Practical Consequences for IEEPA Refund Strategy
The pay-first rule reshapes how importers should think about disputed IEEPA duties. Where an importer has entries that have liquidated with IEEPA duties assessed, and it intends to litigate, it must budget to pay those liquidated duties to preserve the § 1581(a) route — even while arguing the duties were never lawfully owed. The payment is recoverable if the importer prevails, but it is a precondition to being heard. For an importer with significant exposure, this is a cash-flow planning issue as much as a legal one, and it should be mapped against the entry calendar early.
Consider an illustrative scenario (offered only to show the mechanics): a California importer has twenty entries that liquidated with IEEPA duties, filed timely protests, and received denials. To sue under § 1581(a), it must pay the liquidated duties on those entries and file its summons within 180 days of each denial. If it pays but files on day 200, the case is untimely; if it files on day 150 but has not paid, the case is dismissed for failure to satisfy § 2637. Only payment plus a timely summons opens the merits.
When the Residual Route Changes the Calculus
Not every IEEPA claim runs through § 1581(a). A claim properly framed as a challenge to the administration or enforcement of the tariff laws may proceed under § 1581(i), which does not carry the § 2637(a) payment prerequisite in the same way and is governed by the two-year clock of § 2636(i). Choosing the correct door is therefore consequential: it determines both whether payment is a precondition and which deadline applies. The choice is not free — residual jurisdiction is available only when another subsection is unavailable or manifestly inadequate — but where it properly applies, it can avoid the pay-first hurdle. This is one more reason the jurisdictional analysis must come first, before any refund suit is filed.
Coordinating Administrative Refunds With Litigation
For many importers, the better path to an IEEPA refund will not be litigation at all but the administrative refund process — reliquidation and the refund mechanisms Customs is administering in the wake of the Supreme Court’s decision. Litigation under § 1581(a) is the backstop for entries where the administrative process does not deliver a refund and a protest has been denied. The two tracks should be coordinated: an importer should pursue administrative refunds while preserving its protest and payment posture so that, if the administrative route fails, the litigation door remains open and its prerequisites are already satisfied. Letting a protest-denial clock run while waiting on an administrative outcome can forfeit the litigation option.
Why Early Legal Review Protects the Claim
Because § 2637 and § 2636 are jurisdictional, the time to get them right is before filing, not after a dismissal. An importer should, for each disputed entry, confirm the liquidation date, the protest-denial date, whether the liquidated duties have been paid, and the resulting summons deadline. That review is inexpensive relative to the refunds at stake, and it is the only way to be certain a claim will reach the merits. A dismissal on a jurisdictional prerequisite is often unrecoverable once the limitations period has passed, which makes the up-front analysis the highest-value step in any IEEPA refund litigation plan.
The Pay-First Rule and the Finality of Liquidation
The payment prerequisite does not stand alone; it works together with the finality of liquidation under 19 U.S.C. § 1514, which we examine in our article on the finality of liquidation and the 180-day protest clock. Finality determines whether an entry can be contested at all; the pay-first rule determines whether, having preserved a contest through a timely protest, the importer can get into court on the denial. An importer needs both: a timely protest to avoid finality, and payment of the liquidated duties to satisfy § 2637(a). A failure at either stage is fatal. An entry that went final because no protest was filed never reaches the pay-first question; an entry that was protested and denied still cannot be litigated under § 1581(a) unless the liquidated duties are paid.
Viewed together, the two rules describe a disciplined sequence that an IEEPA refund claimant must follow from the moment duties are assessed: protest in time, pay the liquidated amount, and sue within the limitations window after denial. Each link in that chain is independently necessary, and the chain is only as strong as its weakest link.
What Counts as "Liquidated Duties"
Section 2637(a) speaks of "all liquidated duties, charges, or exactions." The amount that must be paid is the duty as fixed at liquidation on the entries the importer intends to contest — not an estimate, and not a partial payment. For IEEPA entries, that means the full IEEPA duty assessed at liquidation on each entry in the suit must be paid before filing. Where an importer contests many entries, the aggregate can be substantial, and the payment obligation should be quantified entry by entry as part of the pre-filing analysis. Because the requirement is measured at the time the action is filed, an importer cannot file first and pay later; the payment must precede or accompany the summons.
This precision matters because an underpayment — paying most but not all of the liquidated duties on the entries at issue — can be as jurisdictionally fatal as paying nothing. The safe course is to confirm, entry by entry, that the full liquidated amount has been paid and documented before the summons is filed.
No Hardship Exception
Importers sometimes ask whether a court can relax the payment requirement in cases of financial hardship or where the duties are large and the illegality of the tariff seems clear. The answer, under settled authority, is no. Because § 2637(a) is a jurisdictional condition rather than a discretionary procedural rule, courts do not have authority to waive it for hardship or on equitable grounds. The remedy for an importer that cannot or does not want to pay the full liquidated duties before suing is to consider whether its claim properly fits the residual-jurisdiction route, which does not carry the same prerequisite, or to pursue the administrative refund process instead of litigation. What an importer cannot do is ask the Court of International Trade to hear a § 1581(a) case without first satisfying the payment condition.
Documenting Payment for the Court
Because payment is a jurisdictional fact, it must be provable. An importer preparing to sue should assemble documentation establishing that the liquidated duties on each contested entry were paid before the summons was filed — payment records, CBP account statements, and entry-level accounting that ties each payment to each entry. If the government challenges jurisdiction, the importer will need to demonstrate compliance, and contemporaneous records make that straightforward. Building this documentation as part of the pre-filing process, rather than scrambling for it after a jurisdictional challenge, is simply good practice in customs litigation.
The same discipline applies to the limitations proof. Because the summons must be filed within the window § 2636 allows, the importer should document the protest-denial date for each entry and the date its summons was filed, so that timeliness is as provable as payment. Jurisdictional facts are the government’s first line of defense in a refund suit, and an importer that can establish both payment and timeliness on the face of its records removes the easiest grounds for dismissal before the merits are ever reached.
Frequently Asked Questions
Do I really have to pay the IEEPA duties before suing to get them back?
For a denied-protest case under 28 U.S.C. § 1581(a), yes. Section 2637(a) requires that all liquidated duties on the entries at issue be paid at the time the action is filed. The payment is the precondition to the Court of International Trade hearing your refund claim, even though you are arguing the duties were never lawfully owed.
What happens if I file suit without paying first?
The court lacks jurisdiction and will dismiss the case. Because § 2637(a) is jurisdictional, the court cannot waive it. If the limitations period has expired by the time you try to cure the defect, the claim may be lost entirely.
How long do I have to file after my protest is denied?
Under 28 U.S.C. § 2636(a), you must commence a § 1581(a) action within 180 days after the date the notice of protest denial is mailed. This is a jurisdictional deadline, so it must be calendared carefully.
Is the deadline different if I use residual jurisdiction?
Yes. A § 1581(i) residual-jurisdiction action must be filed within two years after the cause of action first accrues, under § 2636(i). That route also does not impose the § 2637(a) payment prerequisite in the same way, which is one reason the correct jurisdictional classification matters so much.
Which route applies to my IEEPA refund claim?
It depends on the nature of the claim. A dispute over how a specific liquidated entry was handled generally proceeds under § 1581(a) as a denied protest. A challenge to the administration or lawfulness of the tariff program itself may proceed under § 1581(i). Residual jurisdiction is available only when another subsection is unavailable or manifestly inadequate.
If I pay the duties and win, do I get the money back?
Yes. The payment required by § 2637(a) is recoverable if you prevail; it is a precondition to being heard, not a forfeiture. But you must front the liquidated amount to open the courthouse door under the denied-protest route.
Should I litigate or pursue an administrative refund first?
Often both, in coordination. Many importers will recover through the administrative reliquidation and refund process without litigating. Litigation under § 1581(a) is the backstop, and you should preserve its prerequisites — timely protest, payment, and summons — while the administrative process plays out, so the option remains open.
How should a California importer start?
With a jurisdictional and deadline review of every disputed entry: liquidation date, protest-denial date, whether liquidated duties are paid, and the resulting summons deadline. Trembach Law Firm can run that review and coordinate payment, protest, and filing. Call (213) 645-2246.
Talk to a California Customs Lawyer Before You File
The "pay first" rule of 28 U.S.C. § 2637 and the deadlines of § 2636 decide whether an IEEPA refund suit is heard or dismissed before the merits. Because both are jurisdictional, they cannot be fixed after the fact, and a meritorious refund claim can be lost to a missed prerequisite. Trembach Law Firm, led by Anatolii Trembach (LL.M. in international trade; admitted in California), confirms the payment posture, calendars the limitations clocks, and coordinates protest, payment, and summons so your IEEPA refund claim reaches the merits. Call (213) 645-2246 before you file.
Contact Trembach Law Firm at (818) 514-7680 for a confidential consultation.
Trembach Law Firm | 27001 Agoura Road, Suite 350, Calabasas, CA 91301