Thai document legalisation, translation and notary — answered

Yes. Thailand acceded to the Hague Apostille Convention and apostilles are issued by the Department of Consular Affairs. For a destination that is also a Convention member, an apostille replaces the old chain of MFA legalisation followed by embassy legalisation. For a non-member destination, that older two-step chain still applies.

Both certify that a signature and seal on a document are genuine. An apostille is a single standardised certificate accepted by every Hague member without further steps. Legalisation is the older bilateral chain: the Thai ministry certifies the document, then the destination country's embassy in Bangkok certifies the ministry. Which one you need is decided entirely by the destination country, never by preference.

No. A Notarial Services Attorney licensed by the Lawyers Council may certify signatures, copies, identity, affidavits and declarations for use abroad. They cannot make an untrue document true, cannot certify a Thai government record as authentic in place of the issuing office, and cannot substitute for ministry legalisation where the destination requires it.

It depends on the receiver. The Thai Ministry of Foreign Affairs legalises translations that meet its own standard. Several European embassies accept only sworn translators on their published list. Australian immigration requires NAATI-certified translators. A university or an employer may accept any competent agency certification. Sending the wrong category is the single most common cause of rejection.

The Chaeng Watthana legalisation counter runs an express service measured in roughly one working day and a standard service measured in several. Volumes spike before school terms and after long holidays, so plan to a realistic range rather than the best case, and never book a flight or an embassy appointment against the fastest possible outcome.

The document does not, but the receiver's acceptance window does. Many embassies will not accept a police clearance, a marriage status certificate or a bank letter older than three or six months, and some count that window from the date of issue rather than the date of legalisation. Sequence the case so the short-lived documents are obtained last.

In most cases yes. Scans start the file, originals travel by courier, and the finished set is couriered back. Steps that require your own signature can often be executed at a Royal Thai Embassy in your country of residence instead of in Bangkok.

Four things, in order of frequency: a translation certified by someone the receiver does not recognise, a name spelled differently across documents, a missing intermediate certification in the chain, and a document that expired while sitting in a queue. All four are avoidable at the review stage, which is why the review is free.

No honest provider can. Approval is a discretionary decision by an immigration officer or a consular officer. What we can control is that the file is complete, correctly translated, correctly legalised and internally consistent — which is what most refusals actually turn on.

Our fee is quoted separately from government fees, which are set by the ministry and passed through at cost with the receipt. Any quotation that bundles them into one round number is hiding which part is negotiable and which part is not.