Vietnam Certificate of Origin: Complete Guide for US Importers
Published by Agile Apparel Source | June 2026
If you're sourcing apparel from Vietnam and shipping to the US, the Certificate of Origin (C/O) is one of the most commercially consequential documents in your import package — and one of the least understood by brands placing their first overseas orders.
This guide covers what a C/O actually is, why it matters for US tariff calculations, what conditions your production needs to meet for it to be valid, and what happens if it's issued incorrectly.
What a Certificate of Origin Is (and Isn't)
A Certificate of Origin is an official document that certifies the country where a product was manufactured. In the context of apparel, "manufactured" has a specific legal meaning — it doesn't mean where the fabric was woven or where the brand is based. It refers to where the substantial transformation of the garment occurred: cutting, sewing, and finishing.
A C/O is not:
A quality certificate
A customs clearance document by itself
Proof of brand ownership or trademark
It is a declaration — backed by the exporting country's trade authority — that the goods described were produced in that country, meeting the origin rules required for the classification being claimed.
For Vietnam-origin apparel entering the US, the C/O is issued by the Vietnam Chamber of Commerce and Industry (VCCI) or an authorized body, based on documentation submitted by the exporter.
Why It Matters: Section 301 Tariffs and MFN Rates
The practical significance of a valid C/O for US importers comes down to tariff exposure.
Apparel manufactured in China is currently subject to Section 301 tariffs — additional duties layered on top of standard rates, ranging from 25% to 145% depending on product category. These tariffs apply specifically to goods of Chinese origin. They do not apply to goods of Vietnamese origin.
Apparel manufactured in Vietnam is subject to standard Most Favored Nation (MFN) duty rates — the baseline tariff rate that applies to imports from countries without special trade agreements with the US. For most apparel categories, MFN rates typically range from 12% to 32% depending on fabric composition and construction type.
The difference between paying MFN rates versus Section 301 rates can be substantial on a per-unit basis — and at 150–500 units per style, that difference adds up quickly.
A valid C/O is what establishes that your goods qualify for MFN treatment rather than Section 301 rates. Without it, US Customs can reclassify the shipment's origin, exposing you to the higher tariff.
The Origin Rule: What "Made in Vietnam" Actually Requires
For a garment to qualify for Vietnamese origin status, it must meet the substantial transformation standard. In apparel, this generally means the fabric-to-garment conversion — cutting and sewing — must occur in Vietnam.
In practice, this means:
Fabric sourcing doesn't disqualify Vietnamese origin. Vietnam sources significant quantities of fabric from China, Korea, Taiwan, and elsewhere. Imported fabric that is cut and sewn into a finished garment in Vietnam still produces a Vietnamese-origin garment under US customs rules.
Decoration and finishing alone are not sufficient. If a garment is manufactured elsewhere and only labeled, tagged, or minimally processed in Vietnam, it does not qualify for Vietnamese origin. US Customs has become significantly more sophisticated at identifying transshipment schemes.
Documentation must support the claim. The C/O isn't self-certifying. The exporter must be able to demonstrate — through production records, fabric purchase invoices, and factory documentation — that the garment was actually produced in Vietnam.
The EU Standard: A Stricter Rule
For brands shipping Vietnam-origin apparel to the EU under the EU-Vietnam Free Trade Agreement (EVFTA) — which provides 0% import duty for qualifying goods — the origin rule is more demanding.
EVFTA requires what's called "double transformation": both the yarn-to-fabric stage and the fabric-to-garment stage must occur within Vietnam or the EU. In practice, this means fabric sourced from China and used to make garments in Vietnam generally does not qualify for EVFTA preferential rates — unless the fabric itself was woven in Vietnam.
This is a meaningful distinction for brands sourcing for both US and EU markets. The same production run may qualify for MFN treatment in the US but not for EVFTA preference in the EU, depending on where the fabric originated.
What Gets Documented in a Standard Export Package
For a standard shipment from Vietnam to the US, the complete export documentation package typically includes:
Commercial Invoice — describes the goods, quantity, unit price, and total value
Packing List — itemizes contents by carton, style, size, and color
Bill of Lading (B/L) — issued by the shipping line, confirms goods were loaded
Certificate of Origin (C/O Form B) — issued by VCCI, certifies Vietnamese origin
Other certificates as required — depending on product type (e.g., testing reports for children's garments, fabric composition certificates)
For most apparel shipments to the US, Form B is the standard C/O form. It's a government-issued document, not something a manufacturer can produce independently.
Common Errors That Invalidate a C/O
A C/O that's issued with errors — or that doesn't accurately reflect the actual production — creates customs risk that falls on the importer of record, not the manufacturer.
Issues that frequently cause problems:
Mismatch between C/O description and shipment contents. If the C/O lists "100% polyester woven shorts" and the actual goods are a poly-spandex blend, customs may flag the discrepancy.
Incorrect HS code. The Harmonized System code on the C/O must match what's declared on the customs entry. HS code errors are common and can trigger delays or audits.
Late issuance. A C/O is typically issued at or just before shipment. Backdated or retroactively issued C/Os are a red flag in customs review.
Transshipment without transformation. Goods that were manufactured in China and routed through Vietnam without genuine transformation do not qualify for Vietnamese origin. US Customs enforcement on transshipment has increased substantially in recent years.
What to Confirm with Your Manufacturer Before the First Shipment
Before your goods ship, confirm the following with your manufacturer or sourcing partner:
Will a C/O Form B be included in the export documentation package?
Can they provide fabric purchase invoices to support the origin claim if requested?
What is the declared HS code, and does it match your planned customs entry classification?
If shipping to the EU, does the fabric source qualify for EVFTA double-transformation?
These questions aren't bureaucratic formality — they're the difference between a smooth customs clearance and a shipment that gets held, reclassified, or assessed additional duties after the fact.
One Practical Note
At Agile Apparel Source, C/O issuance and a complete export documentation package — commercial invoice, packing list, bill of lading, and C/O Form B — are standard inclusions on every order, not add-ons. If you're comparing manufacturers, it's worth asking explicitly: who handles the paperwork, and what's included by default.
Agile Apparel Source handles apparel production for emerging and small-scale US brands, with MOQs starting at 150 units per style. All orders include standard export documentation and C/O issuance. If you have questions about import classification or duty planning, contact us to discuss.
