Vietnam ISO Certificate for Use in China
The Situation
A ISO certificate issued in Vietnam has to be used in China. The instinct is to send the original to China and sort it out there.
That instinct costs an international courier round trip, because China does not authenticate foreign documents. The authentication has to happen in Vietnam, before the document travels.
What Actually Went Wrong
Chinese notaries cannot authenticate a foreign original. They can notarize a translation of it, which is a different act, and that act does not substitute for authentication abroad.
The correct sequence is two-stage: consular legalisation through the Chinese embassy in Vietnam, since Vietnam is not yet covered by the Convention for China, then a Chinese translation notarized as required by the receiving Chinese authority.
How It Was Resolved
Obtain the authentication in Vietnam first. Then have the document translated into Chinese by an agency the receiving Chinese authority accepts, and have that translation notarized in China where required.
The two stages are normal and expected. Merging them, or reversing them, is what causes rework — and rework here means another courier leg in each direction.
The General Rule
Foreign-to-China work inverts the usual sequence, and that inversion is the whole lesson.
For Vietnam specifically: Vietnam is not covered by the Convention for China until 11 September 2026, so consular legalisation is the only route before that date. The same standard applied to a ISO certificate going the other way does not carry over, because the two directions are governed by different receiving systems.
Check These Before You Submit
- Get the consular legalisation in Vietnam first
- Do not send an unauthenticated original to China
- Use a translation agency the Chinese receiving authority accepts
- Budget two international courier legs
Legal Basis
Hague Apostille Convention of 5 October 1961; China in force since 7 November 2023.