An investor from the United States registering a branch of a foreign company — how should the supporting documents be translated and certified?

The case under review is “An investor from the United States registering a branch of a foreign company”, so it flags what usually causes documents like this to be rejected before summarising the general practice. The terms that frame this page are investor · United · States · registering. The specifics here are destination: Us, and those decide which translation and certification level applies. 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. The deciding factor is the receiving body's requirement, not only the format of the Thai-side document. Check first whether the issuing office of the source document is one the destination recognises. 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. For documents going abroad, include international shipping time in the plan. If multiple certified sets are needed, order them all in the first round to avoid re-queuing. Once the set is complete, check it line by line against the destination's own checklist before filing. Foreign documents used in a work permit or incorporation file — degrees, experience letters, the parent company's certificate of incorporation, powers of attorney and passports — must be translated into Thai or English as the office requires and certified along the correct chain: certification in the country of origin, then embassy or Department of Consular Affairs legalisation as applicable. Companies are registered with the Department of Business Development (DBD), Ministry of Commerce: a private limited company is formed under the Civil and Commercial Code and a public limited company under the Public Limited Companies Act B.E. 2535 (1992), with a memorandum of association, articles and a shareholder list among the incorporation papers. 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. 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