Apostille Certification: documents, steps and pitfalls
Thailand deposited its instrument of accession to the Apostille Convention on 30 June 2026; the Convention enters into force for Thailand on 28 February 2027. Until then Thai documents still require MFA legalisation plus destination-embassy attestation.
อ่านภาษาไทย: คู่มืออะโพสทีล (Apostille)
Documents to prepare
- Original Thai government-issued document, or a document certified by a notarial attorney
- Certified English translation
- Copy of the document holder's passport
- Power of attorney authorising us to act
- Written requirements from the receiving authority abroad
Step-by-step process
- 1
Check that the destination is a Convention party and what it accepts from Thailand during the transition
- 2
Obtain the original source document from the issuing authority
- 3
Prepare a certified translation in the language the destination requires
- 4
File for legalisation at the Department of Consular Affairs, MFA
- 5
Before 28 Feb 2027 continue to the destination embassy; from that date the apostille route applies
- 6
Verify acceptance with the receiving party before shipping the document
Cautions and common mistakes
- Relying on claims that Thailand is already bound in 2026 and planning on that basis
- Translating before the latest original is issued, forcing a re-translation
- The document is older than the receiving authority accepts
- The destination requires its own official language, not English
- Not keeping colour copies at each stage, making loss recovery difficult
Compare: do it yourself vs let us handle it
Consult before you start — advisers, not just processors
We do not simply process paperwork — we advise throughout the case. With more than 15 years of experience we review your documents before anything is filed, flag where rejection risk sits, and sequence the full chain end to end. If you would rather not run the process yourself, send the documents for a no-obligation review first.
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