Royal Thai Embassy Legalisation in Singapore, Until Thailand Moves to Apostille in 2027

Thailand acceded to the Apostille Convention on 30 June 2026, and the Convention enters into force for Thailand on 28 February 2027. Until that date, Thai embassy legalisation in Singapore remains the required final step; from that date, an SAL apostille should be enough.

That leaves a practical question for anyone with a Thai matter in the next few months: legalise now, or wait?

Expect a transition period. When China joined in 2023, some receivers kept asking for the old embassy stamp for a while. Thai district offices, land offices and banks may do the same after February 2027. If a Thai receiver asks for embassy legalisation after that date, ask them to confirm in writing — and we can still carry out the embassy step if they insist. How the embassy step fits the wider chain is explained on our embassy attestation page; Malaysia and the UAE, by contrast, have no apostille date in sight.

The Royal Thai Embassy in Singapore will only verify a Singapore document that is in English (or has an English translation), has been certified by a Singapore Notary Public, and has then been legalised by SAL. Only after those two Singapore steps does the embassy add its own verification.

The notary requirement applies even to documents that SAL would otherwise take directly, such as a Singapore marriage certificate. For Thailand, the embassy asks for the original plus a copy bearing the Notary Public's seal — so the notary is always the first stop.

What the embassy asks you to bring, according to its non-Thai document verification page:

• The original document and a copy carrying the Notary Public's seal
• A photocopy of every page of the document
• The embassy's application form, completed
• The fee of S$30 per document, payable in cash
• If someone else submits for you: a signed authorisation letter and a copy of your identity document

What the route costs

The prices shown above are starting prices. Your final price depends on the document type, number of pages and destination country, and will be confirmed in a written quotation before any work begins.

Embassy fees are paid at cost. Our fee covers the preparation, the queue and the return trip.

The Royal Thai Embassy accepts document verification submissions Monday to Thursday, 9:30am to 11:30am, excluding holidays, with no appointment needed. Processing takes 3–5 working days, and collection is Monday to Thursday between 2:00pm and 3:00pm.

Those narrow windows are the main reason clients hand this step to us. A submission that arrives at 11:40am, or on a Friday, waits until the next accepting day. The embassy is also closed on its own published holidays, so check its holiday notices, especially around Songkran in April and the year-end period.

A realistic end-to-end timeline from Singapore:

In total, allow roughly two working weeks from signing to having the verified set in hand; this is our typical range, not a promise, because the embassy and SAL stages are outside our control.

A Singapore resident marrying a Thai national in Thailand usually needs proof of being free to marry — in practice a statutory declaration of marital status signed before a Singapore Notary Public — together with passport copies and, if applicable, divorce or death documents from any previous marriage. Each goes through Notary, SAL and the Royal Thai Embassy.

Singapore does not issue a "single certificate". How single status is proved from Singapore — the declaration, ROM search results and additional papers for divorced or widowed applicants — is covered on our single status certificate attestation page.

What happens after the documents leave Singapore is worth knowing so you can plan:

• Singapore Embassy in Bangkok. It certifies supporting documents for marriage registration in Thailand, by appointment. Some couples need this step as well; check with the embassy.
• Thai translation. Thai authorities commonly need the documents translated into Thai and the translation certified by Thailand's Ministry of Foreign Affairs.
• District office registration. The marriage is registered at a district office (amphur or khet). Ask the office you plan to use for its own list — requirements differ between offices.

We handle only the Singapore part. Before you book flights, confirm with the Thai district office or your Thai lawyer that the Singapore-side documents we prepare match what they will ask for.

A Singapore company appointing someone in Thailand to act for it — to register a branch, sign contracts, handle a bank account or deal with a land office — usually signs a corporate power of attorney before a Singapore Notary Public. It then goes to SAL and the Royal Thai Embassy.

One of our corporate clients needed exactly this: a POA signed by a director appointing a representative in Thailand, with a notarial certificate and legalisation. The details that make these documents work:

• Signing authority. The notary checks that the person signing may bind the company — usually from the ACRA Business Profile and, where needed, a board resolution authorising the POA.
• Company seal or stamp. If the company uses one, bring it; some Thai receivers like to see it.
• Precise powers. Name the Thai agency or transaction. A general corporate POA may be refused where a specific one is expected.
• Receiver's own form. Thai government offices, particularly land offices, often use their own POA forms. Ask your Thai lawyer whether to sign their form instead of a Singapore-drafted document.

The wider corporate process, including board resolutions and on-site signing for several directors, is on our corporate document attestation page. Personal POAs for Thai property follow the same chain — see power of attorney attestation.

The Royal Thai Embassy requires any document not in English to carry an English translation, attached to the original as a single set, with the Notary Public's signature on the first page. The set is bound before notarisation, then legalised by SAL and verified by the embassy as one item.

For most Singapore documents this is not an issue, since they are already in English. It matters when a document is in Chinese, Malay or Tamil, or when a Thai-language document is involved, such as a contract drafted in Thai by the other side.

Thai-language versions for use inside Thailand are a separate step. They are usually prepared in Thailand after the embassy stage and certified there. If your Thai lawyer asks for a Thai translation from Singapore, ask whether a Singapore-made version will be accepted before paying for one. The general rules on how translations enter the legalisation chain are on our translation attestation service page.