Certificates of Origin: Choosing the Right Form to Unlock FTA Tariffs

Free trade agreements do not cut your duty automatically — a certificate of origin does. It is the document that proves your goods qualify for a preferential rate under a specific agreement. Choosing the correct form and getting the rules of origin right is what converts a negotiated tariff cut into money saved at the border.

What a certificate of origin does

A C/O attests where goods were produced. Customs at the destination uses it to decide which tariff applies. There are two broad kinds: a non-preferential C/O simply states country of origin for statistics, quotas or trade-defence purposes; a preferential C/O unlocks a reduced or zero duty rate under a trade agreement. It is the preferential one that saves you money.

The main forms a Vietnamese exporter uses

Each agreement has its own form. The ones seen most often from Vietnam include:

• Form D — within ASEAN, under the ATIGA agreement.
• Form E — ASEAN–China (ACFTA).
• Form AK / AJ / VK / VJ — ASEAN–Korea, ASEAN–Japan, and the Vietnam–Korea and Vietnam–Japan bilateral deals.
• EUR.1 — for the EU under EVFTA.
• Form CPTPP — under the CPTPP, which moves toward exporter self-certification.

The agreement decides the form. Ship to the EU under EVFTA and a Form E will not help you — only the EUR.1 (or a valid origin declaration) unlocks the rate.

Rules of origin: the real test

A form is only valid if the goods genuinely qualify. The rules of origin define "genuinely", usually through one of three tests: wholly obtained (grown, mined or born in the country), a regional value content threshold (a minimum percentage of value added locally), or a change in tariff classification (the inputs shift to a different HS heading during processing). Different products and agreements use different tests — check the specific rule for your HS code.

How to apply

In Vietnam, preferential certificates are issued through the Ministry of Industry and Trade's eCoSys system and authorised bodies such as VCCI, increasingly with electronic issuance and, under newer agreements, self-certification by approved exporters. Prepare the manufacturing evidence — bills of materials, supplier declarations and cost workings — before you apply, because that substantiation is exactly what an origin verification later asks to see.