Customs Fraud: The Goods Stay the Same and the Paperwork Changes

Customs fraud is duty evasion through false declarations about imported goods or knowingly leaving duties unpaid. It can make a dishonest importer look like a better business. The importer lies about what its goods are, what they cost, or where they were made, and pays less duty. An honest competitor has to beat a price that leaves out a bill it paid. The Treasury loses the difference.

How Importing Works and Who Owes Customs Duty

Importing joins a commercial transaction to a declaration to the government. The supplier invoices the goods, a broker may transmit the entry, and the importer declares their value, classification and origin. CBP Form 7501, the entry summary, carries the declaration of prices, values and goods or services supplied free or at reduced cost. Customs duty is the importer’s bill, owed when the goods arrive.

The importer of record remains responsible for customs duties even when a broker prepares the paperwork. Under the customs regulation on duties, that bill is a personal debt to the United States. Paying the broker does not discharge that debt if the broker never pays Customs.

The system lets goods move before the accounting is finished. U.S. Customs and Border Protection can release a shipment before fully examining its declared value, classification, and duty. The final amount comes later, through customs liquidation. The goods can be sold long before that happens. Customs relies on declarations, documentary checks and later review to handle that flow of goods.

For antidumping duties, the deposit at entry is an estimate. The final bill can change after the importer has priced and sold the shipment.

Why Honest Importers Lose to Customs Fraud

A dishonest importer gets the price advantage now. The government has to pursue the unpaid bill afterward. Univar‘s disputed Chinese saccharin imports faced a 329% antidumping rate. An importer avoiding that bill has room to undercut a business that pays it.

Univar agreed to a $62.5 million settlement in April 2019 over Chinese saccharin allegedly routed through Taiwan to avoid antidumping duties. This was a government customs penalty action. The business that paid its duties in full never had that price advantage.

Island Industries kept encountering Chinese products priced below what it could match. Its competitor, Sigma Corporation, sold Chinese-made welded outlets. Sigma’s catalog and website used that name. Its customs forms called the same goods steel couplings, which carried no antidumping duty. The name changed where the bill was calculated.

Island’s sales manager had no trade-law background. He searched Google, contacted an analyst at the Department of Commerce, and found the antidumping order and the ruling covering welded outlets within 24 hours. Both dated to 1992. Sigma’s executive overseeing imports testified that the company had never seen them until 2017 or 2018. A competitor found in a day what the company importing the goods had gone roughly 25 years without seeing.

The scale reaches beyond individual shipments. The White House’s August 2026 transshipment report places the Council of Economic Advisers’ estimate of potential transshipment in 2025 at $34.2 billion to $89.6 billion in goods. Customs fraud settlements announced by the Department of Justice in 2026, through October 4, add up to a tiny fraction of the estimated fraud.

How False Customs Declarations Leave Duties Unpaid

The strongest customs fraud evidence shows two accounts of the same shipment: what the business actually bought and what it told Customs. Product specifications can contradict the customs description. Factory records can contradict the claimed origin, and the actual manufacturer can carry a different duty rate. An audit warning or broker’s question can show what the importer knew when it made later entries.

Customs shipping documents can expose import fraud by connecting the cargo to the declaration. Accounts payable can show that the supplier payment exceeds the customs invoice. The discrepancy sits between departments that each hold a different part of the transaction.

Customs fraud under the False Claims Act reaches money knowingly kept from the government. A reverse false claim means knowingly avoiding money owed to the government. The importer need never ask the government for a payment. Keeping money it owes is enough.

The Department of Justice alleged that Barco Uniforms and its suppliers undervalued imported apparel and that underpayment continued after an outside auditor recommended double-checking the duty calculations. That warning matters because it creates a before and after: what the business had been doing, what it was told, and what it did next.

A former Barco employee started that case as a whistleblower, and the government joined it. Deliberate ignorance in customs fraud can show up in the decision to avoid checking the duty at all, as the Sigma evidence showed.

Who Can File a Qui Tam Lawsuit?

Employees, competitors and industry organizations have brought customs qui tam cases. Island Industries brought its competitor’s case. Former employees have brought cases, and an aluminum industry organization joined whistleblower claims over purported pallets.

If you want to report competitor customs fraud, the Sigma case shows what turns a price concern into a case: the product, the applicable duty, and what the importer told Customs. A low price starts the inquiry. It does not finish it.

A competitor can expose customs fraud without internal invoices. The organization behind the Victaulic case supported its allegations with shipping manifests, more than 200 public product listings, an expert analysis and examples of the goods. The court’s account of that investigation shows how product knowledge can connect overseas shipments to goods offered for sale without proper origin markings.

A customs broker whistleblower may know which instructions produced the false entry. A sourcing manager may know the actual factory. You do not need to settle the tariff question yourself to be a customs fraud whistleblower. Knowing which invoice went to the broker, who questioned it, and what happened next can be the contribution nobody outside the company can make.

How Do I Report Customs Fraud?

To decide how to report customs fraud, speak with our whistleblower experts about what you know and which route fits your case. We assess the unpaid duty and the evidence with you before a report or filing. Questions about anonymity or your own role in the transactions belong in that conversation with us and customs fraud whistleblower lawyers.

How Much Is a Whistleblower Claim Worth?

A whistleblower case under the False Claims Act can pay 15% to 30% of what the government recovers. The customs fraud whistleblower reward depends on the route and the recovery, not just the size of the suspected fraud.

The Customs Fraud Patterns Behind the Entries

Customs duty evasion changes the information used to calculate the bill or hides a duty already owed. Tariff fraud can also run the other way, through a refund the importer has not earned. These practices recur across customs fraud cases involving different products and different businesses.

Customs Undervaluation Fraud and Double Invoicing

Customs undervaluation fraud can conceal the price actually paid or any of the five additions covered by customs valuation law. Double invoicing makes the discrepancy plain: a higher invoice gets the supplier paid, while a lower one goes to Customs for the same goods. That is the alleged mechanism in Barco’s apparel imports. Global Plastics and Marco Polo settled claims that they misstated the value and origin of Chinese resin.

Value can also sit outside the goods invoice: undeclared customs assists such as tooling supplied free to an overseas factory and foreign design work, a royalty required as a condition of sale, or resale proceeds owed to the seller. Those costs leave their own payment records.

HTS Misclassification Fraud and False Product Descriptions

HTS misclassification fraud produced a judgment of about $26 million, including customs fraud penalties, in the welded-outlet case. Sigma sold welded outlets and declared steel couplings. NYWL Enterprises declared coaxial cable as welding wire. The court ruled against the company after it did not defend the case.

The product details still matter when software supplies the code. Customs Tariff Classification and the Use of Assistive Technologies, published in World Customs Journal in 2024, describes software asking for a garment’s composition before suggesting its classification. The paper makes the user’s control over those inputs plain:

A broker’s instructions, the factory specification and the description entered into the software are separate places to look for the change.

Country-of-Origin Fraud and Transshipment

Country-of-origin fraud and transshipment allegations were part of a $54.4 million settlement the Department of Justice announced in December 2025. DOJ alleged that Ceratizit USA imported Chinese tungsten carbide through Taiwan and declared it Taiwanese. The Section 301 tariff fraud allegation was one part of a settlement also covering misclassification and unpaid marking duties.

Univar’s saccharin case concerned Chinese goods allegedly routed through Taiwan, while Evolutions Flooring faced allegations of false origin and manufacturer information for Chinese wood flooring. Routing goods through another country does not change where they were made. The question is what production happened there and which origin rule applies.

Antidumping and Countervailing Duty Evasion

Antidumping and countervailing duty evasion allegations led to the civil settlement of $549.5 million with Perfectus Aluminum over the purported pallets.

Perfectus Aluminum imported more than 2.2 million Chinese aluminum extrusions from July 2011 through June 2014. DOJ alleged that the company spot-welded the extrusions into apparent pallets and declared them finished merchandise outside the duty orders. According to DOJ, the supposed pallet business had no customers, and none of those pallets were sold during the alleged scheme. A finished product without a market supplied the claimed reason to escape the duty. Perfectus settled in May 2026, and the Department of Justice’s July Task Force announcement reported the money collected.

The same finished-goods trick runs through the wider aluminum extrusion tariff evasion story.

Allied Stone faced allegations that Chinese quartz was misrepresented as marble or crystallized glass. Antidumping duty fraud can hide whether goods are covered at all, or use the wrong manufacturer’s antidumping duty rate. Countervailing duties raise similar questions. The written AD/CVD order and its scope control coverage. An ordinary tariff code does not settle it.

Known Customs Errors Left Uncorrected

Known customs errors left uncorrected were among the allegations resolved in Grosfillex‘s settlement. The July 2025 settlement was $4,936,732 and paid a 20% whistleblower reward.

An old form can remain a problem after the company learns it is wrong. The decision to leave it alone may be exactly what an insider can explain.

Grosfillex, a patio furniture company, allegedly packaged Chinese aluminum parts as sham furniture kits. The complaint alleges that components imported together were to be separated and matched with different parts after arrival. The whistleblower’s complaint quotes an engineering manager’s instructions about how those purchases should appear:

False Free-Trade Preference Claims

False free-trade preference claims were among the allegations in Linde’s settlement of more than $22.2 million in September 2020. The industrial engineering imports allegedly carried false descriptions, classifications or values as well as improper claims for agreement benefits. A false certificate of origin claims a benefit the goods do not qualify for. The certificate needs to match production, materials, and the applicable program’s rules.

Unpaid Country-of-Origin Marking Duties

Unpaid country-of-origin marking duties can add 10% of the goods’ value to the importer’s bill under the marking law. Improperly marked foreign goods released into commerce can incur that separate duty. In the Victaulic case, the Third Circuit held that unpaid marking duties could support a reverse false claim. Ceratizit’s settlement also covered alleged unpaid marking duties. The ordinary tariff is only part of that bill.

De Minimis Customs Fraud Through Split Shipments

De minimis customs fraud includes historical order-splitting schemes under the former $800 exemption. Selective Marketplace and Pure Collection settled allegations of splitting customers’ orders under the earlier $200 threshold. A customer placed an order, but the retailer divided it into lower-value shipments. The order suspending duty-free de minimis treatment took effect August 29, 2025.

Duty Drawback Fraud and False Refund Claims

Duty drawback fraud targets a refund that can return up to 99% of qualifying import duties after export or destruction under the duty drawback law. A fabricated export can turn that refund into a false claim for payment. Instead of shrinking a bill, the company asks the Treasury to send money. Export records, quantities, and eligibility for the refund are the evidence that matters.

Sources

• Ninth Circuit Court of Appeals: the Sigma Corporation amended opinion, August 21, 2025
• White House: The Great Transshipment Scam, August 2026
• Justice Department: the Perfectus Aluminum settlement announcement, May 12, 2026
• Justice Department: the Barco Uniforms complaint announcement, April 18, 2025
• Justice Department: the Grosfillex settlement announcement, July 24, 2025
• Third Circuit Court of Appeals: the Victaulic marking-duty opinion, October 5, 2016
• Customs Tariff Classification and the Use of Assistive Technologies, World Customs Journal, 2024

You Know What the Shipment Really Was

If the factory, invoice or product tells a different story from the customs entry, speak with our whistleblower experts about the unpaid duty. We turn that knowledge into a case strategy, find customs fraud whistleblower lawyers who understand the products and duty orders, and stay beside you through the case.