Thailand. Legalization until 28 February 2027. Apostille after.
Last reviewed October 20, 2026
Thailand joins the Hague Apostille Convention on 28 February 2027. Until then, California documents need state, federal and Thai embassy legalization.
Flat · state fee included · confirmed in writing before we start
What it costs
- State + federal apostille + embassy legalizationPer document · non-Hague destinations$600
Certified translation is quoted per document by page and language before anything starts.
Not sure yet? Start with the $45 Document Check: $20 of the $45 is credited toward your apostille.
THIS PRODUCT OR SERVICE HAS NOT BEEN APPROVED OR ENDORSED BY ANY GOVERNMENTAL AGENCY, AND THIS OFFER IS NOT BEING MADE BY AN AGENCY OF THE GOVERNMENT.
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Document legalization for Thailand · from California documents
Legalization until 28 February 2027.
Thailand has acceded to the Apostille Convention, but it does not enter into force there until 28 February 2027. Until then a California apostille is not the finishing step. A California document is authenticated by the California Secretary of State, then by the U.S. Department of State, then legalized by the Thai embassy or consulate. From 28 February 2027 an apostille replaces that chain. We run the U.S. chain and check the document before the fee.
At a glance
- Route today
- Consular legalization · CA Secretary of State → U.S. Department of State → Thai embassy or consulate
- From 28 February 2027
- Hague apostille · California Secretary of State · federal records through the U.S. Department of State
- Documents
- Birth, marriage certificates · diplomas and transcripts · powers of attorney · single-status affidavits · corporate documents
- Translation
- Set by the office receiving the document in Thailand. We confirm with that office before anything is translated.
state + federal + embassy · authority fees confirmed before we start
Before you send anything
What the counter accepts for Thailand.
Each line is a real rejection we screen for in the $45 Document Check.
Certified copy from the county recorder or CDPH, not a hospital or informational copy.
Current signing official. The Secretary of State authenticates only signatures it has on file.
Notarized first if it is a power of attorney, affidavit or copy certification.
The right route for the date. A document legalized before 28 February 2027 and one apostilled after it follow different chains. If your deadline is near that date, we confirm with the receiving office which one it will accept before filing.
from · state + federal + embassy · one file
Visa, family and work sets
Birth and marriage certificates, diplomas and powers of attorney, run through every U.S. step in one file.
Returned tracked, with status updates, to Thailand or wherever you are. Price confirmed before any work begins.
Asked on this page
Questions about this route.
Not yet. Thailand has acceded to the Hague Apostille Convention, but the Convention does not enter into force for Thailand until 28 February 2027. Until that date Thailand is outside the Convention, so the apostille is not the finishing step: the U.S. Department of State issues an authentication certificate, and the Thai embassy or consulate then legalizes the document.
From 28 February 2027 the Convention is in force for Thailand, and a California Secretary of State apostille (or a U.S. Department of State apostille for a federal record) becomes the finishing step for documents the Convention covers, in place of embassy legalization. If your deadline falls close to that date, call: we confirm which route the receiving office in Thailand will accept on the day it receives your document.
State first: the California Secretary of State authenticates the signature of the California official on the document. Federal second: the U.S. Department of State authenticates the state certificate. Embassy third: the Thai embassy or consulate legalizes it. We confirm the embassy or consulate's current requirements before filing, and each authority's fee is confirmed before we start.
Whether the office receiving your document in Thailand wants a Thai translation, and who must certify it, is set by that office. Tell us where it is going and we confirm before anything is translated. Translation is quoted per document by page and language before anything starts.
Yes, for the U.S. chain. Order the certified copy from the county or the state and have it shipped to our office at 416 Bryant Street, San Francisco, CA 94107, or mail us what you already hold. We check it, run the Secretary of State, Department of State and embassy steps, and ship the legalized document tracked to you. International delivery and each authority's fee are confirmed before we start, and we can keep you updated by WhatsApp if you prefer.
$45 Document Check · $20 credited
Send the details. We answer within one business day.
The route, anything that would get it rejected, and a fixed price for the speed you need.