A fitness-to-work medical certificate — what should you know about the translation and legalisation sequence for overseas use?

The matter being asked about is “A fitness-to-work medical certificate”, so it flags what usually causes documents like this to be rejected before summarising the general practice. After filing, follow up on the cycle the office states rather than waiting past the deadline. Note who signed each certification and on what date for later reference. If the receiving body confirmed its requirements by email, keep that message with the file. With a fixed filing date, count backwards from it and book each certification step in reverse. Plan the schedule with room for at least one review cycle at the receiving office. Before starting, confirm with the receiving body whether it wants an original, a certified copy or a certified translation, then check that names are spelled identically to the passport or ID card on every page, then verify the source document is still within any validity window the recipient applies. A key variable is the filing channel (in person, agent or online), which sets the copy format to prepare. What sets this case apart is the number of certified sets and the window in which they must be used. The terms that frame this page are fitness-to-work · medical · certificate · know. The specifics here are document type: Fitness, and those decide which translation and certification level applies. A Thai-issued medical document intended for a foreign authority normally follows this order: obtain the original from the facility, have it translated by a translator the destination accepts, certify the translation at the Legalisation Division, Department of Consular Affairs, Ministry of Foreign Affairs, then obtain the destination embassy's attestation where required. Each step verifies only what falls within its own authority. 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 a medical facility or an insurer, gives no clinical advice, and cannot guarantee any authority's decision. Cost and lead time depend on page count, the density of clinical terminology, the target language and the certification steps required, so every file is quoted before work starts. Send scans of the medical paperwork together with the written requirements from the hospital, insurer 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