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

This question is specifically about “An investor from Australia registering a branch of a foreign company”, so it deals with the case-specific points first and the shared rules afterwards. When several certification layers are required, start with the slowest one. For documents going abroad, include international shipping time in the plan. If the receiving body confirmed its requirements by email, keep that message with the file. Note who signed each certification and on what date for later reference. Once the set is complete, check it line by line against the destination's own checklist before filing. The specifics here are destination: Au, and those decide which translation and certification level applies. The terms that frame this page are investor · Australia · registering · branch. Check first whether the issuing office of the source document is one the destination recognises. The biggest risk in cases like this is doing the certification steps out of order, which forces a restart. 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. 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.

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