Thailand acceded to the 1961 Hague Apostille Convention on 30 June 2026; it enters into force for Thailand on 28 February 2027, so Apostilles are not yet issued. Thai documents are legalised at the Department of Consular Affairs, Ministry of Foreign Affairs, and then at the destination country mission where that country requires it.
Clients in Udon Thani can walk in at Udon Thani Branch.
Udon Thani is the main city of the upper north-east, with an international airport and a large community of Thai–foreign families. The files we see most here are marriage documents, income or address confirmations for immigration filings, and powers of attorney for use abroad.
Our staffed office in Udon Thani also serves clients from Sakon Nakhon, Nong Bua Lam Phu and Loei who prefer not to travel to Bangkok. For anything that must go to an embassy, we check the whole set before it leaves the province, because a single missing page usually means a second long trip. Where a foreign authority wants an original rather than a copy, we tell you before you sign so the right number of originals is prepared.
Many Thai–foreign families in Udon Thani renew their visas every year, and the same supporting documents come back each time. Keep certified copies of the documents you reuse, and check the issue date of each one before filing, because immigration officers often want papers issued within a recent window rather than the copy from last year. We keep a checklist of what each family reused, so the next renewal starts from the correct, current set instead of from scratch. Bring your passport with every previous extension stamp, because officers compare the new file against the history it shows.
This list reflects the requirements published by the responsible authority on the verification date. Authorities may change their conditions, so confirm with the source before lodging. Department of Consular Affairs, Ministry of Foreign Affairs · verified 2026-07-31
The steps below are drawn from the procedures the responsible authority publishes itself, with the source and verification date shown. Some steps depend on the case and may change with the authority’s own announcements. Department of Consular Affairs, Ministry of Foreign Affairs · 2026-08-10
The destination country is not a party to the Apostille Convention
If the destination is not a party, the document needs consular legalization plus destination-embassy certification instead, so an apostille will not serve. Check the destination’s status before filing.
Filing a copy the issuing office has not certified
The officer must verify the issuing authority’s signature and seal; a self-made photocopy provides nothing verifiable. Obtain a certified true copy from the issuing office first.
The translation omits parts of the document
Seals, signatures and end-notes form part of the original. A translation that drops them is treated as not matching the original and must be corrected before re-filing.
Incomplete authority for the person filing
When not filing in person, a power of attorney with a copy of the grantor’s ID is required, and its scope must cover the specific filing.
Yes — Udon Thani Branch, 31/43 Si Chom Chuen Rd., Mak Khaeng, Mueang, Udon Thani 41000. Opening hours Mo-Fr 09:00-17:30, Sa 10:00-15:00. Phone +66-94-895-8999.
In most cases no. Filings with central authorities such as the Department of Consular Affairs or an embassy can be handled on your behalf. Steps that legally require you in person — fingerprinting, or signing in front of the certifying attorney — cannot be delegated.
Turnaround depends on the responsible authority’s queue and rules at the time, so we publish no fixed figure. We tell you the authority’s own published window on the day you ask, plus the steps that usually cause delay.
Our team can review documents and coordinate translation, signature certification, legalisation and embassy steps within the agreed scope. Some steps may still require the document owner to appear or sign in person under the receiving authority’s rules.
We do not publish fixed prices: official fees, page counts and language pairs differ in every case. Send the document details and destination and we will scope the work and cost for your specific case.
Documents can travel by trackable EMS or private courier. Confirm the recipient, address and original-document handling before dispatch; the coordinating destination is Udon Thani Branch.
Send the document details and the destination that will receive it. We map the correct chain before starting, flag what usually gets rejected, and run it end to end — as advisers, not just a filing agent.
Last reviewed: 2026-08-11 · Coverage across 77 provinces.