A legitimation registration — what should you know about using a foreign document inside Thailand?

The scope of this answer is “A legitimation registration”, so it deals with the case-specific points first and the shared rules afterwards. Before starting, make sure document numbers, issue dates and issuing-office names match across the set, then keep a digital copy of every page, including seals and signatures, then plan the timeline so certification finishes before the real filing deadline. Check first whether the issuing office of the source document is one the destination recognises. A key variable is the filing channel (in person, agent or online), which sets the copy format to prepare. The terms that frame this page are legitimation · registration · know · using. The specifics here are document type: Legitimation, and those decide which translation and certification level applies. Some registry documents exist in short and full form; check which one the destination requires. Keep certified copies, because registry documents are usually requested again at the next stage. Note who signed each certification and on what date for later reference. High-resolution photos of seals and signatures help when the destination asks for re-verification. When several certification layers are required, start with the slowest one. With a fixed filing date, count backwards from it and book each certification step in reverse. If an entry has been amended, request the certificate of amendment and file it alongside. Some birth and death certificates carry two identity numbers; translate both. After filing, follow up on the cycle the office states rather than waiting past the deadline. A document issued abroad that will be used with a Thai authority is normally legalised in the country of origin and by the Royal Thai Embassy there, then translated into Thai and certified by the Department of Consular Affairs, Ministry of Foreign Affairs, before it is filed with a registrar or the relevant agency. Thailand deposited its instrument of accession to the Hague Apostille Convention on 30 June 2026, but the Convention is not yet in force for Thailand, so consular legalisation through the Ministry of Foreign Affairs and the relevant embassy remains the working route; confirm the current requirement with the receiving authority before filing. ILC handles document work only — translation, certification of the translation, notarial signature certification and the legalisation run at the Ministry of Foreign Affairs and embassies. ILC is not a registrar, cannot amend a register entry and cannot guarantee the receiving authority's decision. ILC handles document work only — translation, certification of the translation, notarial signature certification and the legalisation run at the Ministry of Foreign Affairs and embassies. ILC is not a registrar, cannot amend a register entry and cannot guarantee the receiving authority's decision. Cost and lead time depend on the number of documents, the language pair and the certification steps the receiving authority requires, so every file is quoted before work starts. Send a scan of the documents together with the receiving authority's own instructions via LINE @NAATI, call +66 80-557-8887 or email ilc@thainotary.co.th.

ปรึกษาฟรี — LINE @NAATI · โทร 080-5578887 · อีเมล ilc@thainotary.co.th