A sale and purchase agreement for immovable property — what should you know about the translation and legalisation sequence for overseas use?

This question is specifically about “A sale and purchase agreement for immovable property”, so the answer below starts with what this case actually needs before setting out the general rules. Leave buffer time in case a translation has to be amended or a source document re-issued. For documents going abroad, include international shipping time in the plan. If the receiving body confirmed its requirements by email, keep that message with the file. Attach a document index to the bundle so nothing is lost during review. If any requirement is still unclear, send a sample image to the receiving body before producing the full set. The specifics here are document type: Saleagreement, and those decide which translation and certification level applies. The terms that frame this page are sale · purchase · agreement · immovable. The common failure in this group of cases is a translation that does not match the certification type required. What changes the timeline most here is whether the source documents are complete on day one. Before starting, check that names are spelled identically to the passport or ID card on every page, then confirm with the receiving body whether it wants an original, a certified copy or a certified translation, then count the number of certified sets needed before work starts, because extra sets restart the certification steps. Thai property and succession documents intended for overseas use normally follow one sequence: obtain the official copy, translate it, submit it to the Legalisation Division of the Department of Consular Affairs, Ministry of Foreign Affairs, and then to the destination embassy or consulate where the destination requires it. The order cannot be swapped, because each layer certifies the signature of the previous one. Thailand deposited its instrument of accession to the Apostille Convention on 30 June 2026, but the Convention is not yet in force for Thailand. In practice the traditional route through the Department of Consular Affairs and the destination embassy still applies until entry into force is formally announced. For Australia, government agencies and courts require non-English documents to be accompanied by a translation from a NAATI-certified translator; the translation carries the stamp, practitioner number and certification expiry on its face. 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 the Land Office, not a court and not an estate administrator, and cannot guarantee any authority's decision. Cost and lead time depend on page count, the language pair and the certification steps the destination requires, so every file is quoted before work starts. Send scans of the title documents together with the instructions issued by the Land Office, court or receiving authority 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