Working in a representative or regional office — what should you know about notarial signature certification?

The scope of this answer is “Working in a representative or regional office”, so it separates what is specific to this file from the standard certification chain. If the receiving body confirmed its requirements by email, keep that message with the file. High-resolution photos of seals and signatures help when the destination asks for re-verification. The next step is confirming the filing channel and the copy or file format required. 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. Public holidays and embassy closures move certification queues more than most people expect. With a fixed filing date, count backwards from it and book each certification step in reverse. The terms that frame this page are Working · representative · regional · office. The common failure in this group of cases is a translation that does not match the certification type required. Check first whether the issuing office of the source document is one the destination recognises. 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