Renewing a work permit — what should you know about notarial signature certification?

The issue to settle here is “Renewing a work permit”, so it covers both the requirements attached to this document set and the order the steps must follow. A key variable is the filing channel (in person, agent or online), which sets the copy format to prepare. The deciding factor is the receiving body's requirement, not only the format of the Thai-side document. The terms that frame this page are Renewing · work · permit · know. If multiple certified sets are needed, order them all in the first round to avoid re-queuing. Leave buffer time in case a translation has to be amended or a source document re-issued. 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. Once the set is complete, check it line by line against the destination's own checklist before filing. High-resolution photos of seals and signatures help when the destination asks for re-verification. Attach a document index to the bundle so nothing is lost during review. Powers of attorney and declarations intended for use abroad are usually signed before a Notarial Services Attorney registered with the Lawyers Council of Thailand, then passed to the Department of Consular Affairs and the destination embassy for further legalisation. Thailand deposited its instrument of accession to the Apostille Convention on 30 June 2026, but the Convention is not yet in force for Thailand, so embassy and Department of Consular Affairs legalisation remains the working route. ILC handles the document side only — certified translation, notarial signature certification and legalisation runs at the Department of Consular Affairs or an embassy. ILC is not the deciding authority and cannot guarantee an approval. Cost and lead time depend on page count, language pair and the certification steps the receiving authority requires, so every file is quoted before work starts. Send the checklist you were given, the applicant's nationality and the office you will file with 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