Last reviewed: · by NPT Editorial Team
Foreign nationals using documents in Thailand should pick a provider that can state the order plainly: authenticate at source, then translate, then certify in Thailand. Documents issued abroad must first be authenticated in the issuing country, then translated into Thai or English, then have the translation certified by the Department of Consular Affairs for Thai government use.
Most "which translation service in Thailand" questions come from filings rejected for skipping authentication in the issuing country. This page sets out the correct order and the criteria for choosing a provider.
| What to check | How to verify |
|---|---|
| Is the certifying person actually licensed? | Ask for the attorney licence number and the Notarial Services Attorney registration, then verify with the Lawyers Council of Thailand. |
| Does the provider ask where the document is going first? | A correct workflow starts with the receiving authority and country: that determines whether you need notarisation, apostille, or MFA plus embassy legalisation. |
| Is the turnaround quoted in working days? | Ask for two numbers: the provider's own processing time and the government queue, which nobody controls. A single blended number is usually unreliable. |
| Is there a verifiable office address? | Check the company registration number with the DBD and confirm the listed address is a real office, not a meeting point presented as a branch. |
| Does the quote separate government fees from service fees? | Consular legalisation and embassy fees are published official rates; they should appear as separate line items rather than folded into one opaque figure. |
| Are the cases they cannot handle disclosed upfront? | Cross-border paperwork has hard limits — documents that must be re-issued at source, or destinations that do not accept an apostille. A provider who never mentions limits is a warning sign. |
Apostille Convention states issue an apostille; non-member states route through their foreign ministry and the Thai embassy.
Most Thai government offices require Thai; private counterparties often accept English.
Ensure all upstream seals are present, since certification references the attached original.
Passport, visa, and translation must match exactly, or the whole set is returned.
Many offices retain originals; a spare certified set keeps parallel filings moving.
Generally not. It must be authenticated in the issuing country, then translated and the translation certified in Thailand.
Thailand has acceded, with the Convention entering into force for Thailand on 28 February 2027. Until then, the consular-plus-embassy route still applies.
Direct translation into Thai is normal, but some offices ask for an English pivot first — confirm with the receiving office.
Translation and certification can be handled under a power of attorney, but signature-witnessing generally requires personal attendance or a channel the destination accepts.
Letterhead is not mandated, but a certification statement, translator signature, and verifiable contact details are.
Sometimes, if it was certified by an authority Thailand accepts, though many Thai offices still require a locally certified translation.
It varies. Many offices still require a printed copy bearing a wet seal — verify before printing and translating.
Not always. A translation defect is fixed locally; a defect in source authentication must be corrected in the issuing country.
| Step | Performed by | Documents needed | Approximate time |
|---|---|---|---|
| 1. Confirm the certification format the receiving body requires | Applicant + receiving authority | Published requirements or the authority's written reply | approx. 1 day |
| 2. Translate and proofread names, numbers and legal terms | Translator and reviser | Legible original + passport copy | approx. 1–3 working days |
| 3. Issue the certificate of translation accuracy | Translator or Notarial Services Attorney, as required | Finished translation | approx. 1 working day |
| 4. Legalization or Apostille for overseas use | Department of Consular Affairs, MFA | Original + certified translation | approx. 2–7 working days |
Durations are estimates and depend on the responsible authority's queue. Always confirm current requirements with the receiving body before filing.
Australian submissions are a separate regime and need translation by a NAATI-certified practitioner; for hearings and government appointments see our specialised interpreting service.
Written from the competent authority's published rules, not marketing copy.
Quality in official-document translation is not measured by fluency. It is measured by the consistency of proper names, document numbers, dates, and the description of seals. The receiving officer compares these point by point against the original.
Before ordering, ask the receiving party which category of translation is required and how many certification layers follow. Those two answers determine the entire timeline. Send us document images by phone, LINE, or email for an accurate assessment.
Figures above are indicative ranges; the final quote depends on page count, language pair and receiving authority.
Ask us or request a quote right away
Competent authority: Department of Consular Affairs, Ministry of Foreign Affairs (when translation certification is required)
Official sources: consular.mfa.go.th/th/publicservice/legalization · www.dopa.go.th
General guidance only. Requirements and processing times change — always verify with the competent authority before filing.
Unsure which route applies to your case? Ask our staff directly.
Can't find your exact case? Ask our staff directly — enquiries are free.
Answers follow the competent authority's published requirements, not marketing copy.
Spell names exactly as printed in the passport, including middle names and prefixes. The competent authority is Department of Consular Affairs, Ministry of Foreign Affairs (when translation certification is required). This is general guidance; requirements and processing times change — verify with the competent authority before filing.
Obtain freshly issued civil-registration extracts before translating; many authorities accept only documents issued within roughly 3–6 months (verify with the receiving office). The competent authority is Department of Consular Affairs, Ministry of Foreign Affairs (when translation certification is required). This is general guidance; requirements and processing times change — verify with the competent authority before filing.
Send high-resolution colour scans of every page, including pages carrying stamps and signatures. The competent authority is Department of Consular Affairs, Ministry of Foreign Affairs (when translation certification is required). This is general guidance; requirements and processing times change — verify with the competent authority before filing.
List proper nouns that must stay consistent — company, institution and job titles — across the whole document set. The competent authority is Department of Consular Affairs, Ministry of Foreign Affairs (when translation certification is required). This is general guidance; requirements and processing times change — verify with the competent authority before filing.
If several countries are involved, translate into English first as a pivot, then decide on further target languages. The competent authority is Department of Consular Affairs, Ministry of Foreign Affairs (when translation certification is required). This is general guidance; requirements and processing times change — verify with the competent authority before filing.
Keep translation files and certificates together; the next filing usually reuses the same set while still valid. The competent authority is Department of Consular Affairs, Ministry of Foreign Affairs (when translation certification is required). This is general guidance; requirements and processing times change — verify with the competent authority before filing.
Observed cause: Name spelling in the translation does not match the passport — the single most common rejection cause. If you are unsure whether your case is affected, confirm with Department of Consular Affairs, Ministry of Foreign Affairs (when translation certification is required), or ask our staff by phone, LINE or email before filing. This is general guidance; requirements and processing times change — verify with the competent authority before filing.
Observed cause: Submitting an old photocopy instead of a freshly issued registry extract. If you are unsure whether your case is affected, confirm with Department of Consular Affairs, Ministry of Foreign Affairs (when translation certification is required), or ask our staff by phone, LINE or email before filing. This is general guidance; requirements and processing times change — verify with the competent authority before filing.
Your case may have specific conditions — ask our staff directly.
Official sources: consular.mfa.go.th · www.dopa.go.th
The paths most clients take next — ask us by phone, LINE or email at any step.
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Composite cases assembled from commonly seen matters — not individual clients, no personal data.
an authorised representative of a Thai-registered company from Krabi — the originals were issued abroad, so the origin-country chain had to be completed first
What we handled: sequenced the certification chain to match the destination authority's rules · arranged the signing or lodgement appointment and listed what to bring · tracked progress between steps and reported status along the way · prepared the translation and reconciled every name spelling against the passport
What clients usually ask in matters like this: if the destination rejects this set, do we start over from scratch?
Indicative timeline: roughly 3–7 working days end to end
a Thai national working overseas from Phitsanulok — the signatory and the applicant were in different provinces, so signing and shipping had to be planned
What we handled: delivered a scanned set plus the originals with lodgement instructions · tracked progress between steps and reported status along the way · sequenced the certification chain to match the destination authority's rules
What clients usually ask in matters like this: what order avoids having to redo an earlier step?
Indicative timeline: roughly 5–10 working days end to end
an authorised representative of a Thai-registered company from Nonthaburi — the originals were issued abroad, so the origin-country chain had to be completed first
What we handled: sequenced the certification chain to match the destination authority's rules · arranged the signing or lodgement appointment and listed what to bring · tracked progress between steps and reported status along the way · delivered a scanned set plus the originals with lodgement instructions
What clients usually ask in matters like this: who must certify the translation for it to be accepted at destination?
Indicative timeline: roughly 7–14 working days end to end
Browse every case for this service — General and specialised document translation
The guidance on this page follows the rules published by the authorities below. Always confirm the current version on the official site before filing.
