When a relative dies in Texas leaving a bank account in Vietnam, or when you need to settle a Vietnamese account from the United States, the bank will require authenticated US documents. A Texas death certificate or power of attorney carries no weight in Vietnam until it is legalized and translated. This page explains how authentication works, including the important date on which the apostille takes effect.
What an apostille is
An apostille is a certificate that authenticates a public document — a notary's signature, a court seal, a registrar's certification — so it will be accepted by authorities in another country. For countries in the Hague Apostille Convention, the apostille is the finish line. For countries outside it, the same Texas certificate is the first step in a short legalization chain.
Does an apostille work in Vietnam?
It will, soon. The Hague Apostille Convention becomes effective for Vietnam on September 11, 2026. On or after that date, a document apostilled by the Texas Secretary of State is accepted directly. Before that date, US documents still need the older consular legalization chain: authentication in the US followed by legalization at a Vietnamese diplomatic mission. Check the date your documents are being processed and use the correct route. Either way, documents must then be translated into Vietnamese and notarized.
How the Texas Secretary of State apostille works
Texas apostilles come from a single office: the Secretary of State's Authentications Unit in Austin. There is no county-clerk step — a document notarized by any Texas notary, in any of the 254 counties, goes straight to the state. Since October 2023 Texas issues one Universal Apostille (Form 2102) that works for every destination, whether or not the country belongs to the Hague Apostille Convention.
The state fee is $15 per document. Mailed requests can take up to 25 business days; in-person and appointment service in Austin is same-day for up to 10 documents, and a bulk drop-box handles larger batches in 24–48 hours. There is no online submission — every request is handled by mail or in person. Certified copies of vital records (birth, death, marriage, divorce) must be less than five years old.
Federal documents — FBI background checks, USCIS naturalization certificates, IRS letters — cannot be apostilled by Texas; they go to the U.S. Department of State. We confirm the correct authority before anything is filed, so your documents are never rejected on a technicality.