What Is Consular Legalization? A Guide for Vietnamese in the U.S.

Do you have a birth certificate, marriage certificate, diploma, or background check issued in the U.S. that you need to use in Vietnam? A U.S. document has no standing in Vietnam by itself — it needs an intermediate certification. Since 11 September 2026 there are two routes to the same destination: an apostille, or consular legalization. This article explains both, and when each applies.

What is consular legalization?

Consular legalization is the process by which a competent Vietnamese authority verifies the seal, signature, and title on a document issued abroad. Once legalized, the document gains legal validity for use in administrative procedures in Vietnam.

In other words, a document issued by a U.S. state isn't automatically recognized in Vietnam — it needs to be authenticated first.

Since 11 September 2026 there are two routes

The 1961 Apostille Convention entered into force for Vietnam on 11 September 2026. From that date:

• An apostille — a single certificate issued by your state's Secretary of State (or by the U.S. Department of State for federal documents). A shorter process, recognized by Vietnam.
• Consular legalization — the longer chain ending at a Vietnamese mission in the U.S. It remains valid: documents already legalized keep their effect, and many receiving offices are used to seeing them.

An apostille certifies the signature, seal and capacity of the person who signed — not that the contents are correct. Which route fits depends on the document and the office receiving it in Vietnam; the reliable approach is to ask that office before you start. A document-by-document table is on the consular legalization page; apostille pricing and steps are on the apostille service page.

Documents that usually require legalization

• Birth certificates and marriage certificates
• Diplomas, transcripts, and certificates
• Criminal background checks
• Single-status certificates, powers of attorney, and many other document types

When do you need this procedure?

You should legalize documents before returning to Vietnam to register a marriage, register a child's birth, apply for a job, enroll in school, or carry out real-estate and inheritance transactions. Doing it early in the U.S. avoids having to ship documents back after you've already returned home.

What does VietVisas help with?

VietVisas's consular legalization service covers the full range of U.S. documents, guides you through the paperwork from start to finish, serves customers across the United States, and delivers results to your door free of charge in all 50 states.

Need to check whether your document requires legalization? Message VietVisas on Facebook for a free consultation.