Submitting a commercial contract or memorandum of understanding to Australia — how must it be translated and certified?

The scope of this answer is “Submitting a commercial contract or memorandum of understanding to Australia”, so it flags what usually causes documents like this to be rejected before summarising the general practice. With a fixed filing date, count backwards from it and book each certification step in reverse. Documents with a short validity window should be produced as close to the filing date as possible. 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. After certification, scan the full set before it leaves your hands. The specifics here are document type: Contract; destination: Au, and those decide which translation and certification level applies. The terms that frame this page are Submitting · commercial · contract · memorandum. What sets this case apart is the number of certified sets and the window in which they must be used. The deciding factor is the receiving body's requirement, not only the format of the Thai-side document. Before starting, keep a digital copy of every page, including seals and signatures, then make sure document numbers, issue dates and issuing-office names match across the set, then ask in advance which category of certified translator the destination accepts. A Thai corporate document for overseas use is normally translated into the language the destination requires, then legalised by the Legalisation Division, Department of Consular Affairs, Ministry of Foreign Affairs, and further legalised by the destination country's embassy or consulate where that country requires it. Australian government agencies and financial institutions require non-English documents to be translated by a NAATI-certified translator showing the stamp and practitioner number; a corporate translation without the NAATI stamp is commonly rejected at the document-check stage. Thailand deposited its instrument of accession to the Hague Apostille Convention on 30 June 2026, but the Convention is not yet in force for Thailand, so consular legalisation through the Ministry of Foreign Affairs and the relevant embassy remains the working route; confirm the current requirement with the destination before filing. Cost and lead time depend on page count, the language pair and the certification steps the destination requires, so every file is quoted before work starts. Send a scan of the documents together with the receiving authority's or counterparty's own instructions via LINE @Thainotary, call +66 094-895-8999 or email contact@thainotary.co.th.

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