Exporting to the US from Vietnam: rules of origin and circumvention investigation risks

For goods made in Vietnam and shipped to the US, origin is no longer a line on a declaration but a legal conclusion that must be provable. US customs applies non-preferential origin rules built on substantial transformation, and runs a dedicated anti-circumvention track for goods suspected of using Vietnam as a shell to dodge anti-dumping and countervailing duties imposed on a third country.

US non-preferential origin: substantial transformation

Unlike preferential origin in free trade agreements, which uses value content or change-of-tariff-heading tests, the non-preferential origin applied by US customs rests on the substantial transformation doctrine: goods take the origin of the country where they last underwent a change in name, character and use. An imported component manufactured in Vietnam into a genuinely new product takes Vietnamese origin; the same component merely inspected and repacked keeps its original origin.

On the Vietnamese side, Decree 31/2018/ND-CP frames goods origin and the issuance of origin certificates, but companies must understand that a certificate issued in Vietnam does not bind US customs’ conclusion. The two systems assess independently, and in disputed cases the factory’s actual production records are the evidence with decisive weight.

When a shipment drifts into circumvention investigation territory

Investigation risk rises sharply where the exported product sits in a group facing high anti-dumping or countervailing duties when originating from a third country, and exports of that group from Vietnam spike within a short period. Markers under scrutiny include inputs sourced mainly from the very country under duties forming most of the value, a thin processing stage in Vietnam, a newly established factory exporting large volumes, and export prices unusually low against declared production costs.

In the US, circumvention inquiries can open under the Enforce and Protect Act mechanism and through scope procedures of the US Department of Commerce. Once under inquiry, goods may require cash deposits at the evaded country’s duty rate while the case runs, and the US importer, not only the Vietnamese exporter, bears the direct financial risk, which is why importers typically demand tight commitments and indemnities in the supply contract.

Proving valid origin through production records

The most effective proof file follows the product’s own value chain: purchase and import documents for materials, consumption norms per unit of product, production orders and machine logs, labour and energy costs, and the manufacturer’s origin worksheet in the form used by Vietnam’s certification bodies. The Vietnamese value-added share computable from these documents is the most persuasive answer to whether production is genuine.

Companies should self-test with a simple question: if a verification team stood in the factory and asked to replay how inputs became finished goods, could the current file retell that story consistently. Every gap between material inputs and exported volumes is where investigators dig, and records created after an inquiry opens carry far less weight than records made contemporaneously with production.

Frequently Asked Questions

What rules of origin apply when exporting to the US from Vietnam?

Exports to the US follow US non-preferential origin rules, centred on substantial transformation: goods take the origin of the country where they last changed in name, character and use. Origin certification in Vietnam runs under Decree 31/2018/ND-CP, but the certificate does not bind US customs; in a dispute, actual production records are the decisive evidence.

When does a circumvention investigation risk arise?

Circumvention risk arises where the product faces high US anti-dumping or countervailing duties from a third country, exports from Vietnam surge, inputs come mainly from the dutied country and the Vietnamese processing stage is thin. An inquiry can open under US anti-circumvention mechanisms, with cash deposits at the evaded rate while the case is pending.

How is valid origin proven?

By proving genuine production in Vietnam: keep the record chain from input material documents and consumption norms through production orders to labour and energy costs, and be able to compute the domestic value-added share for the product. Records must be created contemporaneously with production and reconcile input volumes with exported output, rather than assembled after a query arrives.

What should be done if anti-circumvention duties are imposed?

Coordinate immediately with the US importer, because they carry the deposit and back-duty exposure directly, and prepare the full production file to answer investigators within the set deadlines. Commercially, the contract should allocate anti-circumvention duty risk clearly. Legally, an adverse finding means the goods are dutied as if originating from the evaded country, and the whole pricing model for the US market must be rebuilt.

Bottom line for exporters

Vietnamese origin into the US is a conclusion to be proven through genuine production, not an automatic benefit of siting a factory in Vietnam. Exporters who build contemporaneous, reconciled production records from the first shipment will withstand both routine queries and full circumvention investigations.