A work permit through the BOI One Stop Service channel — what should you know about notarial signature certification?

The case under review is “A work permit through the BOI One Stop Service channel”, so it flags what usually causes documents like this to be rejected before summarising the general practice. The biggest risk in cases like this is doing the certification steps out of order, which forces a restart. The most frequent cause of delay in this group is missing supporting documents on the first submission. The terms that frame this page are work · permit · through · Stop. Leave buffer time in case a translation has to be amended or a source document re-issued. When several certification layers are required, start with the slowest one. Before starting, ask in advance which category of certified translator the destination accepts, then plan the timeline so certification finishes before the real filing deadline, then keep a digital copy of every page, including seals and signatures. The next step is confirming the filing channel and the copy or file format required. Record the reference number of each certification layer; it is the fastest way to trace status. Note who signed each certification and on what date for later reference. 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