A foreign company opening a branch or representative office — how should the paperwork be prepared?

The scope of this answer is “A foreign company opening a branch or representative office”, so it separates what is specific to this file from the standard certification chain. Keep a copy of every source document plus the receipt or docket from each step. Attach a document index to the bundle so nothing is lost during review. Most licences carry an expiry date, so plan renewal ahead of the deadline. When filing for a company, attach current evidence of signing authority. Arrange supporting documents in the order the authority specifies to reduce rejections. The terms that frame this page are foreign · company · opening · branch. The point to fix before starting is the real deadline, so the steps can be scheduled backwards from it. The biggest risk in cases like this is doing the certification steps out of order, which forces a restart. 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. 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. After filing, follow up on the cycle the office states rather than waiting past the deadline. Company formation in Thailand runs under the Civil and Commercial Code for partnerships and private limited companies, and the Public Limited Companies Act B.E. 2535 for public companies. The registrar is the Department of Business Development (DBD) at the Ministry of Commerce, which issues the company affidavit. When a foreign counterparty or authority asks for proof of existence, use the registrar-issued affidavit rather than a copy the company printed itself. For Thai corporate documents lodged with Australian government bodies, non-English documents require a translation by a NAATI-certified translator; the translation carries the practitioner stamp, practitioner number and certification expiry. Check with the receiving body whether it wants a hard copy or a digital file. Investment promotion runs under the Investment Promotion Act B.E. 2520, administered by the Board of Investment (BOI), which grants incentives by promoted activity category. A promoted project can also obtain a Foreign Business Certificate through the BOI route. Operating inside an industrial estate falls under the Industrial Estate Authority of Thailand Act B.E. 2522. Eligible categories and conditions are revised periodically, so always check the current BOI announcement. Cost and lead time depend on page count, target language, how many certified sets are required and the steps the receiving authority sets, so every file is quoted before work starts. Send scans of every page together with the checklist the licensing authority gave you, via LINE @Thainotary, call +66 094-895-8999 or email contact@thainotary.co.th.

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