How do you apostille or legalise documents for Thailand in 2026?

Start in the document’s origin country. Obtain a certified copy or notarised translation as your issuing authority requires, then take the document to the Royal Thai embassy or consulate that covers that jurisdiction for authentication. Embassy websites publish appointment rules, fees, and which languages they accept.

After the document reaches Thailand, submit it to the MFA Department of Consular Affairs for legalisation. The Chaeng Watthana complex in Bangkok is the main hub many movers use; regional MFA offices exist for some document types. Pair the legalised foreign document with a certified Thai translation when Immigration or a Thai employer asks for Thai wording.

Published MFA fee tables commonly cite about 200 THB for standard legalisation and about 400 THB for same-day service, but confirm the current schedule at the counter or official site before you budget a stack of papers.

Non-Immigrant visa extensions, permanent residence applications, work permit supporting files, and some marriage or birth registrations ask for foreign police clearance certificates, diplomas, or marital status papers with full legalisation. A UK ACRO certificate with only a UK apostille and no Thai embassy step can stall a Bangkok Immigration appointment until the chain is rebuilt.

Corporate movers legalise board resolutions, certificates of incorporation, and power-of-attorney forms for Revenue Department or bank KYC teams. Those civilian offices often want MFA legalisation even when Immigration already accepted the passport.

After 28 February 2027, MFA Consular Affairs is designated as Thailand’s apostille authority for outbound use, and inbound Hague apostilles from other member states should replace the embassy step for participating countries. Keep watching MFA notices because transitional rules for documents issued just before the switch date can affect your appointment week.

Match the name on every certificate to the passport used at Immigration. Order fresh police certificates if your target office publishes a maximum age (often six months for clearance reports on extension forms).

Do not rely on informal translation shops for legal submissions unless the receiving office accepts them. Many Thai agencies want translator certification plus MFA steps.

Schedule MFA queues before your Immigration date. Legalisation backlogs have sunk extension appointments that otherwise had correct visa categories.