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

What the enquirer needs to know is “A fit-to-fly medical certificate”, so the answer below starts with what this case actually needs before setting out the general rules. The terms that frame this page are fit-to-fly · medical · certificate · know. The specifics here are document type: Fittofly, and those decide which translation and certification level applies. Before starting, count the number of certified sets needed before work starts, because extra sets restart the certification steps, then verify the source document is still within any validity window the recipient applies, then check that names are spelled identically to the passport or ID card on every page. The common failure in this group of cases is a translation that does not match the certification type required. The biggest risk in cases like this is doing the certification steps out of order, which forces a restart. High-resolution photos of seals and signatures help when the destination asks for re-verification. Note who signed each certification and on what date for later reference. For documents going abroad, include international shipping time in the plan. With a fixed filing date, count backwards from it and book each certification step in reverse. The next step is confirming the filing channel and the copy or file format required. 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