Which authority decides a Long-Term Resident visa — Jurisdiction is split: visa issuance sits with Thai missions abroad, extensions and reporting with the Immigration Bureau, work authorisation with the Department of Employment, and investment privileges with the BOI. Overstay carries statutory consequences, including a daily fine and re-entry bans set by the Immigration Act and related notifications. Extensions of stay and changes of visa class are decided by the Immigration Bureau under the Immigration Act B.E. 2522. Work permits are issued by the Department of Employment and are tied to the named employer, position and work location. Thai tax residence is determined by presence in the country totalling 180 days or more in a tax year under the Revenue Code. On multi-page documents ask the certifier to seal or initial every page to prevent substitution. A contract used as evidence before a Thai court needs a Thai translation and, depending on the transaction, attesting witnesses. When booking an interpreter or attorney, state the language, dialect and subject matter in advance so the right specialist is assigned. Thai Notary Law covers the chain end to end — certified translation, notarial attestation by a Lawyers Council–registered attorney, MFA legalisation and destination-embassy stamping — always with a written scope and quotation first.
“Which authority decides a Long-Term Resident visa?” falls within an end-to-end service that combines document preparation, translation, signature certification, consular legalisation and coordination with the destination mission into a single file. The people who search for it are usually preparing a filing against a fixed deadline, recovering from a rejected submission and trying to identify the missed step, or coordinating documents for several people at once.
In practice, each step sits with a different body: the issuing office, the Notarial Services Attorney, the Department of Consular Affairs, and the destination country’s diplomatic mission. Knowing which body owns which step makes it possible to judge how many stages a bundle needs, and which of them cannot be corrected without starting again.
This is a baseline set. Individual receiving authorities may add requirements, so confirm with the destination body first.
Record how many stages each document needs, who certifies it, and what must finish first, so no step has to be redone.
Check personal names, company names, addresses and dates across the whole bundle before any certification begins.
Original → translation → signature certification / legalisation → destination mission. Doing these out of order forces a restart.
Verify the number of sets, the seals, the binding, and that issue dates are still within the destination’s validity window.
| Route | When it applies |
|---|---|
| Notarial Services Attorney certification | For privately drafted instruments — powers of attorney, affidavits, consent letters — signed in the attorney’s presence. |
| Legalisation at the Department of Consular Affairs | Where a foreign authority needs confirmation of the Thai issuing office’s signature and seal, or of the translation. |
| Attestation at the destination mission | Where the destination country requires its embassy or consulate in Thailand to attest the file after consular legalisation. |
| Thailand’s Apostille status | Thailand acceded to the Apostille Convention on 30 June 2026 and it enters into force for Thailand on 28 February 2027. No Apostille is issued in Thailand before that date. |
If you are working through “Which authority decides a Long-Term Resident visa?”, start by getting the receiving authority’s requirement in writing, then plan the certification chain backwards from your real filing date.