Customs Liquidation and Unpaid Duties: Why the Duty Bill Outlasts the Sale

Customs can release a shipment, the importer can sell it, and the duty bill can stay open for years. When Customs sets the final amount, it can be larger than the deposit the importer paid at entry. The goods are gone. The rest of the bill still belongs to the importer.

The Importer Declares, Then Customs Fixes the Bill

Customs liquidation fixes the final duty on an entry. Release lets the cargo move. Unpaid duties can remain after the merchandise has reached its customer.

The entry supplies the information U.S. Customs and Border Protection needs to release the goods. The entry summary supplies the declared value, classification and duty rate, with estimated duties deposited against that declaration. The summary can follow release. The importer declares the price and the product, and Customs settles the final amount later. That separation between release and accounting is built into the entry requirements.

The customs bond covers estimated duties and additional duties subsequently found due. It promises payment of a bill whose final amount may still be unknown. Providing the bond leaves the importer’s debt in place.

When Does an Importer Owe Customs Duty?

The debt begins when the goods arrive. Under the regulation governing duty liability, it is the importer’s own debt to the government. Paying a customs broker leaves that debt with the importer if the broker never pays Customs.

For the employee looking into a broker not paying customs duty, the distinction is concrete: the company’s payment to its broker and the broker’s payment to Customs are separate transactions. The first can appear in accounts payable while the second never happens. A customs broker whistleblower may know where the money stopped.

How Many Days Until an Entry Liquidates?

Under the statutory liquidation rule, an entry generally becomes final after one year if Customs has not liquidated it and no extension or suspension applies. This is called deemed liquidation: the rate, value, quantity and duty amount are the ones the importer declared. A declaration can be final and still be false. An importer cannot use liquidation to erase the unpaid-duty loss in a False Claims Act case.

The liquidation regulations allow Customs to extend liquidation when information needed to assess the goods is unavailable, or when an importer requests more time for good cause. Extensions can hold an entry open for four years. Suspension for antidumping or countervailing duties can keep it open longer.

The distinction appears in the notice record. Customs’ liquidation guidance identifies the public electronic Official Notice of Extension, Suspension and Liquidation.

A spreadsheet that closes every entry by age can therefore write off a bill Customs has yet to finish. The entry’s status and the notices extending or suspending liquidation belong beside its date.

Why the Final Antidumping Bill Can Be Bigger

The final antidumping or countervailing duty rate can be higher than the deposit rate the importer paid when the goods entered. Under the Department of Commerce’s retrospective assessment system, final liability is determined after importation. By then, the importer may have priced and sold the merchandise using the deposit rate.

Antidumping duty fraud can begin with a declaration that the goods are outside an order altogether. The deposit, final assessment and payments need to be matched to the same entries to find what remains unpaid.

The delay has a measurable commercial consequence. The Government Accountability Office’s 2016 report estimated that about $2.3 billion in antidumping and countervailing duties remained uncollected as of mid-May 2015, for goods entering in fiscal years 2001–2014. Twenty importers accounted for about 50% of that balance. Most of those importers had stopped importing before they received their first bill for those duties.

Shell importer duty evasion adds the question of which business stands behind the named importer. Someone inside who knows the real owner can connect it to the unpaid entries.

What Evidence Is Needed to Prove Fraud?

The strongest customs fraud evidence connects the actual goods and payment to the declaration, then shows what the business knew. A catalog, supplier invoice or internal cost sheet can describe the same shipment very differently from the paperwork used to calculate its duty.

Sigma Corporation sold welded outlets but declared them as steel couplings, avoiding antidumping duty. Its website and product catalog used the real product name. Its customs forms used the name that did not trigger the duty. The court’s account of the trial evidence puts the commercial description and the customs description beside each other. The name changed where the bill was calculated.

The evidence can begin before arrival. For ordinary vessel imports, the Importer Security Filing data includes the seller, buyer, importer number, manufacturer or supplier, country of origin and tariff number. Those fields connect the commercial parties and the product to the shipment. Public vessel-manifest information can also identify shippers, consignees and cargo. That gives a competitor an outside view of the trade and an insider another account to compare with the company’s own records.

Why the Invoice Number Matters

A 2020 U.S. Census Bureau Center for Economic Studies paper, Are Customs Records Consistent Across Countries? Evidence from the U.S. and Colombia, found that matching buyers and sellers across the countries’ customs data was much easier than matching their individual shipments. Only 25-30 percent of individual transactions matched using the study’s shipment-matching methods. The paper recommended standardized invoice or bill-of-lading numbers to connect transactions across borders.

That finding explains the value of the missing connection an insider may hold. A supplier invoice, its payment and the filed entry can put the actual price beside the declared price for the same shipment. The business records supply the connection that a broad trade-data pattern may lack.

What Happens If You Use the Wrong HTS Code?

The wrong HTS code can put the wrong duty rate on an entry. The fraud question connects the product and declaration to what the importer knew or chose to ignore. In Sigma, the jury heard that the company had made no inquiry about antidumping duties before declaring that none were owed. Its catalog and customs forms also used different names for the same goods.

The Duty Is Owed Before Liquidation

The importer owes the duty before Customs fixes its final amount. Sigma argued that the unfinished calculation meant it had no obligation to pay under the False Claims Act. The court rejected that argument: Sigma owed the antidumping duties when its Chinese welded outlets arrived, even though liquidation had not fixed the number.

Its competitor, Island Industries, brought the whistleblower case, which the government declined to join. The jury found more than $8 million in damages before the law tripled them. The court explained the loss as the difference between what Sigma should have paid the government and what it actually paid. Waiting for the final calculation had not stopped the debt from arising.

When an importer evades the duty, the competitor that paid in full carries a cost the dishonest business avoided. Taxpayers are left waiting for money they were owed when the goods arrived.

When Unpaid Customs Duties Become a Whistleblower Case

Knowingly avoiding money owed to the government can support a customs whistleblower case. This is a reverse false claim: the money should have reached the Treasury and stayed with the importer instead.

Under Customs’ own penalty law, duties lost through a violation must be repaid, liquidated or not. A whistleblower case under the False Claims Act can pay 15% to 30% of what the government recovers.

A customs fraud whistleblower inside the business may know why the report upstairs says cleared while the duty bill remains open. Logistics knows the goods were released. Finance knows a deposit was paid. Trade compliance knows liquidation is still suspended. Each department may be describing its own completed task while the company still owes an unfinished bill.

The Unpaid-Duty Pattern Inside the Business

False value can survive a comparison between an entry and the invoice attached to it when the invoice itself understates what the importer paid. The cost records inside the business can tell a different story.

Matching Documents Can Carry the Same False Price

The whistleblower’s complaint against Echelon Fitness Multimedia alleged that the exercise-equipment importer used a second invoice with a lower price than the one it actually paid. It also alleged that Echelon bought tablets separately, sent them to the equipment assembler and left their cost out of the declared value. The complaint described why a check of the entry package could miss the alleged scheme:

The alleged gap sat between the price paid inside the business and the price shown to Customs.

Apparel Costs Can Sit Outside the Sewing Contractor’s Invoice

Apparel customs undervaluation fraud can hide materials the importer bought separately. The government’s complaint against Alexis alleged that the company supplied fabric and trim to garment manufacturers but omitted those materials from its customs values. It described understated invoices sent to brokers and identified internal work-in-progress reports as evidence. In that account, the sewing contractor’s invoice covered only part of what went into the clothing.

The government alleged that High Life worked backward from an existing delivered price, freight costs, desired profit margins and a desired duty amount to produce declared values for 67 shipments. The complaint said vendors then supplied invoices reflecting the prices High Life had dictated. On that account, the desired margin helped set the declared purchase price, instead of the actual purchase price determining the duty.

What Happened After the Company Knew

Grosfillex, a patio furniture company, agreed to a $4.9 million settlement in July 2025 over alleged duty evasion on Chinese extruded aluminum. The Justice Department’s announcement described both sham furniture kits and a separate group of parts for which the company allegedly left earlier entries uncorrected after learning they falsely claimed no antidumping or countervailing duties applied. A former employee brought the whistleblower case.

That is why failure to correct a customs entry matters under the False Claims Act.

What Is the Customs Fraud Statute of Limitations?

There is more than one deadline, and some reach back further than people expect. The deadline for a customs penalty case differs from the False Claims Act’s. Which deadline applies to what you know is one of the first things we work out with you.

In a double-invoicing case, the fraud discovery date can become central to the customs limitations dispute. Greenlight Organic’s case concerned alleged undervaluation and misclassification of apparel. Greenlight pointed to information the government received in 2011. The government pointed to February 2012, when it said the company first supplied internal records showing double invoicing. What the invoices revealed, and when they reached Customs, mattered alongside the dates the goods entered.

A customs limitations waiver adds another dated document. Katana Racing, a wheel and tire distributor, signed three waivers after a Customs audit. Its dispute about the last waiver turned on a meeting, a follow-up letter and what Customs had promised the company. The entry date alone did not tell that story.

Customs records retention and a False Claims Act filing deadline answer different questions. Dated emails, audit reports, entry histories and government letters can connect the shipments, the open balance and the decisions about paying it. They also pin down, by date, what the company knew and what the government had learned, which memory rarely can.

Who Can File a Qui Tam Lawsuit?

A competitor can bring a customs qui tam case. Island Industries did so against Sigma after its sales manager investigated Chinese products that kept undercutting its prices. According to the court’s account, he had no specialized trade-law experience and found the relevant antidumping order and ruling within 24 hours. Both dated to 1992. Sigma’s executive overseeing imports testified that the company had not seen them until 2017 or 2018.

The competitor recognized the product and the price problem. The importer selling those goods said it had never seen the documents explaining the duty.

Who Is the Importer of Record for a DDP Shipment?

The importer of record is the company identified on the customs entry, even when a delivered-duty-paid contract puts the expense on the seller. Whether the right duty ever reached the government is a separate question.

Importer-of-record identity theft can put a company’s number on transactions it did not authorize. When an unexpected bill exposes that problem, who authorized the entry and who paid the duty are questions we examine with the business records.

Sources

• Ninth Circuit Court of Appeals: the Sigma Corporation amended opinion, August 21, 2025
• U.S. Customs and Border Protection: Liquidation in ACE, February 8, 2018
• Government Accountability Office: Antidumping and Countervailing Duties, July 14, 2016
• U.S. Census Bureau Center for Economic Studies: Are Customs Records Consistent Across Countries? Evidence from the U.S. and Colombia, 2020
• Court of International Trade: the Greenlight Organic opinion, August 4, 2022
• Court of International Trade: the Katana Racing opinion, September 9, 2024
• Department of Justice: the Grosfillex duty-evasion settlement announcement, July 24, 2025

When the Company Is Counting on Time

If you know of old entries, an open duty bill or a deadline management is relying on, speak with our whistleblower experts about the money still owed. We build your customs whistleblower case around the unpaid entries and the decisions that kept the money from Customs. We stay beside you through the case and find customs fraud whistleblower lawyers who understand delayed duty assessments.