They said it was made in Vietnam. Customs said China
Transshipment and origin fraud risk and how to prevent it - why anti-dumping circumvention happens, how customs catches it, the back duties, penalties and criminal exposure importers face even when they didn't know, legitimate ways to secure origin, and a supplier due diligence checklist

Hello, this is GreenFrog Seoul.

Two years ago a Korean building materials importer switched suppliers. Its long-time Chinese factory had just been hit with anti-dumping duties, and the factory's sales rep offered a fix: "We'll produce at our partner plant in Malaysia and ship with a Malaysian certificate of origin." The unit price was almost unchanged and no anti-dumping duty applied. From the importer's side, it looked like a good deal.

Then a notice of an origin investigation arrived. Korea Customs asked Malaysian customs to verify the shipments, and the exporter named on the certificate turned out to be a trading company with no production equipment. The cargo had simply come from China into a Malaysian port and been reloaded, container and all. Customs ruled the goods Chinese and assessed two years of imports for anti-dumping duty, VAT and the penalty tax for fraudulent conduct. The proposed assessment came to nearly half the company's annual revenue.

The CEO said, "We only believed the factory when they told us they had moved." Even if that's true, the tax bill goes to the importer. Not knowing may be taken into account when criminal liability is considered, but it does not cancel the duty or the anti-dumping duty itself.

How to claim FTA preferential rates the proper way is covered in Episode 94, and how anti-dumping duties work is in Episode 92. This article looks at the other side: why illegal transshipment that changes origin only on paper happens, how customs finds it, and what the importer ends up carrying, plus what to check at your supplier if you want to secure origin legitimately.

In the origin fraud cases we see, importers who set up the scheme themselves are far less common than importers who simply accepted a proposal from a factory or middleman. The trouble is that customs never asks whose idea it was.

1. Why origin laundering happens - the pull of a tariff gap

Origin laundering means making goods produced in one country look as if they were produced in another, to avoid the importing country's duties or restrictions. Because it usually involves routing goods through a third-country port or bonded warehouse, it is commonly called illegal transshipment or circumvention.

It happens because the same product can carry very different duties depending on its origin. Where anti-dumping or countervailing duties apply only to Chinese goods, rates run from tens of percent to several hundred percent. The US adds Section 301 tariffs and other additional duties on Chinese goods on top of that. Change one line on the origin and the entire gap disappears, so the temptation is obvious.

There is a reason factories raise these ideas first. Once anti-dumping duties land, they expect Korean buyers to walk away, so they try to hold on to the volume any way they can. The Chinese factory carries almost none of the risk if the origin claim collapses, because the party customs goes after is the Korean importer.

2. What changes origin and what doesn't

Routing through a third country is not illegal in itself. If processing that really changes the character of the product takes place there, origin can legitimately change. The question is where "real processing" begins.

Under the Korean Customs Act, goods produced across two or more countries take the origin of the country where substantial transformation took place. As a rule, that means processing that changes the HS code at the 6-digit level, and simple operations like those below do not change origin even if the code changes. The US applies its own substantial transformation test, asking whether the product has acquired a new name, character and use.

One point often causes confusion. FTA rules of origin and general (non-preferential) origin rules are different sets of rules. A Vietnamese factory's product may meet the Korea-ASEAN FTA rule and get the preferential rate, yet the origin used to decide anti-dumping duties can still be judged separately. Conversely, a product that fails the FTA rule and pays the general rate does not attract China anti-dumping duty if its non-preferential origin is Vietnam. Mixing up the two leads to wrong conclusions.

3. How customs finds it

Origin laundering rarely lasts, because customs sees far more data than most importers assume. It often shows up in the pattern of trade flows before anyone looks at a single set of documents.

Korea Customs

US Customs (CBP) and the Department of Commerce

Korean companies exporting to the US or running a US entity need to know the US side as well. The US has a dense set of tools for catching evasion of anti-dumping and countervailing duties.

The most painful part of EAPA is the interim measures. Even before a final determination, the importer under investigation may have to post cash deposits at the anti-dumping rate on every entry. A determination can take close to a year, so cash is tied up and trade effectively stops in the meantime.

4. What the importer carries, even without knowing

Even when the factory or a middleman devised the scheme, the importer is the party liable for the duties and penalties. In the US, the Importer of Record has a duty to use "reasonable care" in declaring origin, and "the factory told us so" is not enough to meet it.

How the numbers grow

Here is an example. Say you declared a Chinese product subject to a 30% anti-dumping duty as third-country goods and imported KRW 400 million a year for three years. The calculation below assumes fraudulent conduct is found.

You pay 1.5 times the tax you saved over three years, all at once. VAT can be credited as input tax, but penalty tax cannot. The goods have already been sold, so there is no way to pass the cost into the price. Criminal proceedings and damaged customer trust come on top.

5. Stop when you hear these offers

Origin laundering usually starts with an offer from a factory or middleman. When we sort the offers clients have told us about, a few types keep coming back.

Be careful, too, when a Chinese factory says it built a new plant in Southeast Asia within a few months. Many have genuinely relocated, but plenty of those plants exist only in name. A new plant should come with equipment, staff and raw material purchase records, and prices and quality usually wobble in the early months. If nothing has changed at all, that in itself is a red flag.

6. Legitimate ways to secure origin

Aiming for a different origin is not the problem. Moving production to reduce the tariff burden is a sound business decision. But the origin has to come from real production activity, not from paperwork.

Actually moving production

The surest route is to work with a factory that really produces in the third country. A Southeast Asian subsidiary set up by your Chinese factory can work too, but you must confirm that the core processes happen there. Production diversification strategies and country profiles are covered in Episode 56.

Designing processes that achieve substantial transformation

Even if some parts still come from China, origin can change if substantial transformation takes place in the third country. The idea is to split the process so that the third-country plant itself handles key component machining, main assembly or moulding. In that case, keep written records of each process step and its share of cost so you can explain it later.

Getting a ruling in advance

If the origin is borderline, it is safer to get a customs view before you import. Korea operates an advance origin ruling system, and in the US you can request a CBP binding ruling. Submitting process and cost data and getting a ruling in advance greatly reduces the room for a later dispute with customs.

For anti-dumping duties, changing factories can be enough

Anti-dumping duty rates often differ by factory. Chinese factories that cooperated fully with the investigation sometimes receive low individual rates. Without changing origin at all, simply moving to a Chinese factory with a lower rate can cut the burden. How to check factory-specific rates is explained in Episode 92.

7. Supplier origin due diligence checklist

Use this when you start working with a third-country supplier or when an existing supplier says it is moving production. Checking from three angles, documents, the site and the deal structure, closes most of the gaps.

Documents only go so far, so for larger volumes we strongly recommend a site visit. If you can't go yourself, a third-party inspection company can audit the factory for you. What to look at on a factory visit is in Episode 7, and supplier credit checks are in Episode 62.

8. Sample origin clauses for your contract

Origin problems are hard to solve without the supplier's cooperation. Put an origin warranty, an obligation to provide information and liability for breach into the contract. The overall structure of an OEM contract is covered in Episode 12.

Sample wording (origin warranty)
The Supplier warrants that the products supplied under this Agreement have been produced in the country stated on the certificate of origin and commercial invoice through processes that meet the origin rules of the importing country. If the Supplier intends to change the place of production, key processes or the country from which components are sourced, it shall notify the Buyer in writing in advance and obtain the Buyer's approval.

Sample wording (information and audits)
The Supplier shall cooperate with visits by the Buyer or a third party designated by the Buyer to its production facilities to verify processes, raw material purchase records and production records. If the customs authority of the importing country requests origin verification, the Supplier shall provide the necessary documents within 10 business days of the Buyer's request, and this obligation shall survive for 10 years from the date of the last shipment.

Sample wording (indemnity)
If the Supplier's origin warranty proves to be untrue and the Buyer incurs duties, anti-dumping duties, penalty taxes, fines or other losses as a result, the Supplier shall indemnify the Buyer in full.

The 10-year information obligation matches the assessment period that applies when fraudulent means are found. Even with an indemnity clause, though, actually recovering money from a supplier in China or a third country is hard. Contract clauses are an after-the-fact tool; filtering through due diligence comes first.

9. If you already have a suspicious transaction

If a supplier you are working with now trips several items on the checklist above, doing nothing is the worst option. If customs finds it first, fraud penalty taxes and even criminal proceedings can follow, but if the importer corrects it first, the burden drops sharply.

A US prior disclosure only works if it is made before CBP starts an investigation. For a negligent violation, you pay the lost duties plus interest, and the penalty can shrink to almost nothing. In Korea, too, filing an amended return before customs gives notice of an audit leaves room for a penalty tax reduction. In both cases, timing decides the outcome.

10. Three real cases

These are anonymised versions of situations we often see. Amounts and rates are examples.

Case 1 — Only the certificate of origin was from a third country

This is the building materials importer from the start of the article. In response to Korea Customs' indirect verification request, the Malaysian issuing body replied that "the exporter has no production facilities." The importer argued it had simply trusted the factory's offer, but because the price was the same as before the anti-dumping duty and no one had ever checked the plant, it could not avoid the fraud penalty tax. The importer demanded compensation from the Chinese factory, which stopped answering.

Case 2 — Due diligence stopped the deal

This importer bought metal kitchenware. Its Chinese factory sent a new quote, saying it was moving production to a Vietnamese subsidiary. Before placing the order, the importer hired a third-party inspection company to audit the Vietnamese plant. The audit found no forming equipment at all: it was a warehouse that received finished goods from China and only packed them.

The importer walked away and found another Vietnamese factory that really performed the forming process. The unit price rose 12%, but it was still cheaper than Chinese goods carrying anti-dumping duty, and there was no origin problem. A due diligence fee of a few hundred thousand won headed off hundreds of millions of won in exposure.

Case 3 — Caught up in a US EAPA investigation

A Korean company bought aluminium parts from a Southeast Asian plant and exported them to its US subsidiary. When a US competitor filed an EAPA allegation, the plant came under investigation, and CBP required cash deposits at roughly the anti-dumping rate on every entry by the US subsidiary. The company had kept factory visit records and raw material purchase records from the start of the relationship, and the plant was able to prove it had its own extrusion equipment.

The final determination found no evasion and the deposits were refunded, but cash was tied up for ten months. Because all export volume depended on a single supplier, the damage was heavy. The company has since split production between two locations. Dual sourcing is covered in Episode 111.

11. Common mistakes

These come up again and again in origin fraud consultations.

• Going ahead when the factory only said "a partner plant in a third country" and never gave its name or address
• Not questioning a third-country offer at the same price that arrived right after anti-dumping duties were imposed
• Assuming there is no origin issue because there is an FTA certificate of origin
• Not checking the port of loading and transshipment ports on the bill of lading
• Confusing the invoicing country with the country of origin
• Believing that changing packaging and labels in a third country changes origin
• Starting trade on the strength of photos and videos without auditing the plant
• Leaving origin warranties and duties to cooperate with customs verification out of the contract
• Continuing to ship and waiting to see what happens despite doubts
• Only starting to gather records after receiving a customs investigation notice

12. Origin fraud prevention checklist

Before you start trading

• I checked whether my product is subject to anti-dumping or additional duties in Korea (or my export market)
• I verified the supplier's substance, date of incorporation, plant address and ownership
• I received documents on the third-country plant's equipment, capacity and raw material sourcing
• I reviewed with a customs broker whether the third-country processing counts as substantial transformation
• If it is borderline, I applied for an advance origin ruling or binding ruling

At shipment and clearance

• I checked the port of loading, transshipment ports and container stuffing location on the bill of lading
• I checked the issuer, issue date and authenticity of the certificate of origin
• I inspected the product and packaging for other countries' markings
• I compared price and terms with those before the production move to see if they make sense

Ongoing management

• The contract includes an origin warranty, notice of production changes, audit cooperation and indemnity
• I keep due diligence records and supplier documents for 10 years
• Key suppliers are checked at least once a year by site visit or third-party audit
• When warning signs appear, I stop shipments and consider a voluntary correction

Final thoughts - origin comes from the factory, not the paperwork

Companies caught in origin laundering usually say the same thing: "We never thought it would turn into something this big." A decision to save some tens of percent in duty comes back as years of back duties, penalty taxes and criminal proceedings. The factory disappears and the liability stays with the importer.

That is no reason to avoid third-country production. Moving production because of tariffs is a legitimate strategy that many companies are pursuing right now. If the origin is built on real equipment and real processes in a real plant, there is nothing to worry about; if it is built on a sheet of paper, it will come out sooner or later.

The first step is simple. List the products you import from third countries that would have faced anti-dumping or additional duties if they were Chinese. For each one, check whether you can explain the supplier's plant address, equipment and raw material purchase records. If there is a supplier you can't explain, audit it before the next shipment.

GreenFrog Seoul helps importers verify third-country suppliers, audit plants on site, review origin with our partner customs brokers, and design legitimate production moves. If you already have a suspicious transaction, we start with holding shipments and securing records. If you are preparing third-country production, we start with a factory audit.