A medical certificate — what should you know about using foreign medical documents in Thailand?

The scope of this answer is “A medical certificate”, so it flags what usually causes documents like this to be rejected before summarising the general practice. The specifics here are document type: Certificate, and those decide which translation and certification level applies. The terms that frame this page are medical · certificate · know · using. 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, plan the timeline so certification finishes before the real filing deadline, then ask in advance which category of certified translator the destination accepts, then make sure document numbers, issue dates and issuing-office names match across the set. Documents with a short validity window should be produced as close to the filing date as possible. If multiple certified sets are needed, order them all in the first round to avoid re-queuing. 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. If any requirement is still unclear, send a sample image to the receiving body before producing the full set. A medical document issued abroad for use with a Thai authority generally has to be certified in the country of origin and by the Royal Thai Embassy or Consulate there, then translated into Thai with the translation certified by the Department of Consular Affairs before filing. Requirements should be confirmed with the receiving office each time, as they vary by matter. 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. A medical translation must preserve the diagnosis, disease codes, drug names, dosages, units and result values exactly as written — no rounding, no unit conversion, no summarising. Where the original is illegible handwriting, the facility should be asked for a typed version or a written confirmation rather than the meaning being guessed. 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