Certified Translation in Thailand — Expat Guide to NAATI, MoJ, Sworn and MFA-Accepted Translation

Why 'certified translation' is not one thing

Many expats arriving in Phuket assume that any agency with a 'certified translator' stamp produces translations accepted everywhere. In reality, the receiving authority — not the translator — defines what 'certified' means. A perfectly valid translation for the Phuket amphur may be rejected by the Department of Home Affairs Australia; a perfectly valid NAATI translation may be useless for the Thai Land Department.

Before paying for any translation, ask one question: who is the FINAL receiver of the document, and what certification do they require? The answer determines which of the four tiers below you need.

Tier 1 — Standard certified translation (amphurs and routine use)

The most common tier. Any translation agency in Phuket can produce a 'certified translation' by attaching their company seal and a translator's declaration. This is accepted for routine Thai government use:

• Amphur — marriage registration, divorce, name change
• Land Department — property purchase/transfer for foreign-name documents
• Local police station — accident reports, witness statements
• Phuket immigration — visa extension supporting documents
• Typical fee: THB 300–700 per page; same-day available

Tier 2 — MoJ-listed Court Translator

Translators on the Ministry of Justice register are individually vetted and bonded to provide translation acceptable in Thai courts. This is required when the document will be filed as evidence in a Thai civil, criminal, family, or labour court — for example, a divorce judgment, a custody order, or a contract dispute exhibit.

The translation carries the translator's MoJ registration number and is sometimes followed by an oath in front of the court clerk on the day of hearing. Phuket has approximately 20–30 active MoJ-listed translators across the major language pairs.

• Required by: Thai courts, Department of Special Investigation, public prosecutor's office
• Common documents: judgments, custody orders, witness statements, contracts in dispute
• Typical fee: THB 800–1,500 per page

Tier 3 — NAATI translator (Australia)

The Department of Home Affairs Australia accepts ONLY translations produced by NAATI-credentialed translators (or, for in-Thailand translations, translations that are then sworn before the Australian embassy). The translator must hold a current NAATI certification at Recognised Practising Translator level or higher, and stamp each page with their NAATI number.

For Phuket residents applying for Australian partner, student, work, or visitor visas, this is non-negotiable — a NAATI-stamped translation is one of the most common visa rejection causes when missing.

• Required by: Australian immigration (all visa subclasses), Australian universities, Australian state professional registration bodies
• Common documents: birth certificate, marriage certificate, Thai degree transcript, police clearance
• Typical fee: THB 1,200–2,500 per page (online NAATI service) or AUD 80–150 per page (in-Australia)

Tier 4 — Notarized + MFA-legalized translation (overseas embassy use)

The strictest tier. When your translation must be used by a foreign embassy or overseas government office, it normally needs to be both notarized by a Thai Notary AND legalized by MFA Department of Consular Affairs. This four-step process is unavoidable for most non-Hague destinations:

• Step 1 — Certified translation by a translator the embassy recognises
• Step 2 — Notarial Services Attorney notarizes the translator's signature
• Step 3 — MFA legalizes the notary's signature (2 working days)
• Step 4 — Destination embassy in Bangkok authenticates the MFA stamp
• Typical all-in fee: THB 4,500–9,500 per document depending on language pair

What changes with the 2026 Apostille

For Hague-member destinations (UK, US, Australia, EU, Japan, Korea, etc.), the embassy step disappears from mid-2026 onwards. The Apostille from MFA replaces it, shortening the chain to: certified translation → notarization → MFA Apostille. End-to-end cost drops by THB 1,500–4,000 per document, and timeline shortens from 7–10 working days to 3–5 working days.

For non-Hague destinations, all four steps remain mandatory.

Choosing the right translator in Phuket

Phuket has roughly 60–80 active certified translation providers across all language pairs. The reliable filter for foreigners is to confirm three things before paying:

• Which certifications does the translator personally hold? (NAATI number, MoJ register number, sworn translator declaration)
• Does the agency walk the document through notarization and MFA, or only deliver the translation?
• Will the embassy or overseas authority accept the translator's stamp, in writing? (Most reputable agencies will confirm in email)