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Court-Admissible Translation & Sworn Interpreter
Exhibits, pleadings, expert reports and live hearings — accepted in every Thai court.
Quick Answer
Court-admissible translation from THB 900/page; sworn interpreter THB 8,500/half-day. Registered with Civil, Criminal, CIPITC, Bankruptcy, Labour, Administrative courts.
Court types served
- ✓ Civil Court
- ✓ Criminal Court
- ✓ Central IP & International Trade Court (CIPITC)
- ✓ Central Bankruptcy Court
- ✓ Labour Court
- ✓ Administrative Court
- ✓ Juvenile & Family Court
- ✓ Tax Court
FAQ
- What qualifies as an admissible court translation in Thailand?
- Under Rules of Civil Procedure Sec.46 and Criminal Procedure Sec.13, foreign-language exhibits must be accompanied by a Thai translation certified by (a) the Ministry of Foreign Affairs, (b) a translator sworn before the court, or (c) a professional translator whose competence the court accepts. Our translators are pre-registered with the Civil, Criminal, Labour, IP, Bankruptcy, and Administrative Courts.
- Which languages do you cover for Thai courts?
- Full coverage: English, Mandarin, Japanese, Korean, French, German, Spanish, Portuguese, Italian, Russian, Arabic, Vietnamese, Bahasa (Indonesia/Malay), Khmer, Laotian, Burmese, Tagalog, Hindi, Bengali, Persian, Turkish. Rarer languages 48-hr sourcing.
- Can your translator testify as court interpreter?
- Yes. Court-sworn interpreter service available at Civil, Criminal, IP-IT (CIPITC), Bankruptcy, Labour, and Administrative Courts nationwide. Half-day and full-day rates. Sworn statement issued to court clerk before hearing.
- Rates?
- Court-admissible translation THB 900–1,500/page (EN/TH), THB 1,500–2,800/page (CJK/rare). Sworn interpreter THB 8,500/half-day, THB 15,000/full-day, +transport outside BKK. Bundle affidavit + translation + court filing THB 12,500.
Contact: 083-249-4999 · LINE @NYC168 · contact@ilc.ltd
Thai courts operate in Thai, and that governs everything
Proceedings before Thai courts are conducted in the Thai language. A document in any other language is not evidence until it is accompanied by a Thai translation, and the court may direct how that translation is produced. This is not a formality that can be handled after filing. A bundle served with untranslated annexes invites an objection that costs a hearing date, and hearing dates in the Civil Court are not easily recovered.
The court's concern is fidelity and accountability, not elegance. What it wants to see is a complete rendering — including stamps, marginal notes, handwritten amendments and anything struck through — together with a translator's certification identifying who produced it and confirming its accuracy. Selective translation of the 'relevant' clauses is the fastest way to have a document challenged, because the opposing party will read the omission as concealment.
Where a party or witness does not speak Thai, the court appoints or approves an interpreter and the interpretation is consecutive and on the record. Written translation and in-court interpretation are separate disciplines with separate standards, and conflating them — sending a document translator to interpret cross-examination — is a false economy we advise against.
Document classes and how each is handled
| Document class | Handling | Common objection if done badly |
|---|---|---|
| Contracts and agreements | Full translation with clause numbering preserved | Renumbered clauses that no longer match the pleading's references |
| Foreign judgments and orders | Full translation plus authentication chain | Translation filed without evidence of the issuing court's authentication |
| Bank and financial records | Full translation including column headings and footnotes | Figures translated but currency and date conventions left ambiguous |
| Corporate registers and resolutions | Translation matched to the DBD-registered Thai company name | Company name rendered phonetically instead of using the registered Thai name |
| Emails and messaging evidence | Complete thread, timestamps and metadata retained | Extracted fragments that remove context the other side then supplies |
| Expert reports | Translation with terminology glossary appended | Inconsistent rendering of the same technical term across sections |
Our workflow for litigation-grade translation
- Scope and terminology lock: Before translation begins we agree the rendering of party names, defined terms, statutory references and technical vocabulary, and record them in a glossary used across the whole bundle.
- Primary translation by a subject-matter translator: Commercial disputes, construction claims and family matters draw on different vocabularies; the translator is matched to the subject.
- Independent legal review: A second reviewer checks the translation against the source for completeness, including marginalia and stamps, and against the glossary for consistency.
- Certification and pagination: Each translation carries the certification statement and is paginated to correspond with the source exhibit so the court can move between them.
- Filing support and interpretation planning: Where hearings will involve foreign-language witnesses, the interpreter is briefed from the same glossary well before the hearing date.
Foreign documents that must be authenticated before they are translated
A foreign public document — a company extract, a court order, a civil registry certificate — usually needs authentication in its country of origin before a Thai court or a Thai government office will treat it as genuine. Until Thailand's accession to the Apostille Convention takes effect on 28 February 2027, that means endorsement by the Thai embassy or consulate in the issuing country, followed by certification of the Thai translation by the Department of Consular Affairs in Bangkok.
Sequence matters. Authenticating the source first and translating second produces a bundle where the translation covers the authentication endorsements as well, which is what a reviewing officer expects to see. Translating first and authenticating later leaves the endorsement untranslated at the back of the document, and we routinely rebuild bundles that failed for exactly that reason.
Common mistakes and how we avoid them
More questions we are asked
- Does the court require a specific certified translator?
- The court may direct how translation is produced and may require the translator to be identifiable and available. We provide a certification naming the translator and their qualifications on every filed translation.
- How quickly can a bundle be turned around?
- It depends on volume and technicality. We give a page-count-based schedule at the outset and prioritise exhibits by hearing date rather than by file order.
- Can handwritten Thai documents be translated?
- Yes, with a legibility note where any portion is genuinely unclear. Silently guessing at an illegible word is worse than flagging it.
- Do you translate into English as well as into Thai?
- Both directions. Foreign parties usually need the Thai pleadings and orders rendered into English to instruct their own counsel and insurers.
- What about documents already translated by someone else?
- We can review and re-certify, but where the earlier translation is partial or inconsistent a fresh translation is usually faster than reconciling it.
Knowledge bases behind every service
7 knowledge bases, 4,882 keywords and 3,057 answered questions written by our lawyers and translators. Free to read, no sign-up.
- Certified translation — every language
Certified translation across civil, academic, corporate, contractual, financial, medical, technical and IP documents — with the Notary → MFA → embassy legalization chain handled end to end.
Thai–English THB 500–1,200/page · other languages THB 800–2,500/page
1,000 keywords · 500 questions · 16 clusters
- Thai MFA consular legalization
Thai MFA legalization workflow: fees, turnaround, inbound foreign documents, and how the chain connects to destination-country apostille requirements.
THB 200/stamp (3 working days) · express THB 400/stamp
882 keywords · 500 questions · 16 clusters
- NAATI certified translation (Australia)
NAATI-certified translation for Australian partner, student, skilled and qualification-assessment lodgements, stamped by a NAATI-credentialled translator.
THB 1,300–2,500 per document · 5–7 working days
500 keywords · 408 questions · 16 clusters
Official sources — document translation
The information on this page follows the official sources below. Always check the latest version before you file.
- กรมการกงสุล — บริการรับรองเอกสาร (นิติกรณ์)— กระทรวงการต่างประเทศ
- ระบบนัดหมายรับรองเอกสาร (Legalization e-Service)— กรมการกงสุล
- กระทรวงยุติธรรม— Ministry of Justice
- ISO 17100 — Translation services requirements— ISO
- USCIS — certified English translation requirement (8 CFR 103.2(b)(3))— USCIS
- UK Home Office — certified translations for visa applications— GOV.UK
Related services
Most document work runs across several steps — jump straight to the next one you need.
- Sworn translation
- NAATI translation
- Consular legalization
- Notary Public
- Interpreting services
- Full service index
For an exact quote and turnaround, call, LINE or email our team on any business day.
Expert reviewed: This page is written and checked by practitioners with 15+ years of hands-on filing experience, sourced from the responsible authorities and signed off by a second reviewer before publication — meet the team · editorial policy
Not sure which service you need? Read the guides
Each guide answers first, then explains: decision criteria, comparison tables, the real process and the mistakes we see most often.
- Choosing a certified translation provider
How to pick a translator accepted by consular, embassy and receiving bodies
- Services for expats living in Thailand
Signature certification, residence, marriage and everyday paperwork
- Notary Public and consular legalization
The correct order of steps before sending documents abroad
- Choosing the right visa and work permit
Compare visa categories and the documents each one needs translated
- Translation by language
English, Chinese, Japanese, European, Arabic, Russian and embassy rules
- Specialized translation
Contracts, financial statements, MSDS, ISO and BOI filings
Talk to us first: 083-249-4999 · LINE @NYC168 · contact@ilc.ltd
Frequently asked questions
- What makes a Thai translation 'certified' and who is allowed to certify it?
- A certified translation is a translation issued with a signed certification statement from a translation agency or qualified translator confirming the text is a true and complete rendering of the original. Thailand has no single government translator register for general use, so acceptance depends on the receiving authority: the Department of Consular Affairs accepts translations submitted with the original document for legalization, embassies usually accept agency-certified translations, and some foreign authorities additionally require a sworn or NAATI translator. We confirm the receiving body's rule before translating so the document is not rejected later.
- Do I need the original document or is a scan enough for translation?
- A clear scan is enough to produce the translation, but the original is normally required for the legalization step that follows. The Department of Consular Affairs checks the translation against the original or a certified true copy issued by the responsible Thai authority, so if you plan to legalize, send us a high-resolution scan to start the translation and keep the original ready for submission.
- How should Thai names be spelled in an English translation?
- Always match the spelling printed in the passport, even when it differs from Royal Thai General System transliteration. Authorities compare the translation against the passport and treat any mismatch as a different person, which is one of the most common causes of rejection. If a name has been spelled differently on older documents, we add a spelling-variation note or arrange a name-consistency affidavit.
- How long does a certified translation take and can it be rushed?
- Standard civil documents such as an ID card, house registration, birth or marriage certificate are typically ready in one to two working days, while contracts, court judgments and academic transcripts take longer because of terminology checks. Same-day handling is possible for short standard documents if the scan arrives in the morning; rush handling does not shorten the separate MFA legalization queue.