Case study: a NAATI translation set for an Australian partner visa
Thai-language documents filed with Australian authorities must be translated by a NAATI-certified translator and carry the translator stamp and certification number. The usual failure is not translation quality: it is an incomplete source set or names spelled inconsistently across documents.
The situation
A Thai spouse lodging an Australian partner visa
The client had to file civil-status records and relationship evidence with an Australian authority. All source documents were in Thai and had to be accompanied by NAATI-certified translations.
What actually blocked the file
- The romanised name on the birth certificate and house registration did not match the passport.
- Scans were supplied at a quality where seals and reference numbers were unreadable, so the translation could not carry every detail of the original.
- Some items were plain copies that the issuing office had not certified as true.
The sequence we ran
- Audited the whole source set before translating and listed the items that had to be re-issued as certified copies.
- Fixed a single romanisation of every name, taken from the passport, and applied it across the set.
- Requested high-resolution scans or originals so that seals and reference numbers were legible.
- Translated through a NAATI-certified translator, with stamp and certification number.
- Proofed the translation against the original entry by entry before delivery.
Outcome
The set was delivered with the NAATI translator stamp on every item, and no request for further information was raised on account of the translations.
What to prepare for a NAATI certified translation
- A clear, full-page colour scan of every page of the source document
- Name spelling exactly as it appears in the passport so it matches your visa file
- The receiving body you will lodge with, e.g. Department of Home Affairs, AHPRA or a university
- Supporting records such as a name-change certificate when names differ across documents
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. NAATI — National Accreditation Authority for Translators and Interpreters, Australia · 2026-07-31 · source
How a NAATI-certified translation is produced
- Scan every page of the source document, front and back, with seals and signatures fully legible.
- Provide the exact spelling of names as they appear in the passport so the translation matches what the Australian body will see.
- A translator certified by NAATI in the matching language direction produces the translation.
- Proof the translation against the original entry by entry: dates, document numbers, issuing office names and seal text.
- Apply the NAATI stamp with the practitioner number, date and translator’s certification statement to the translation.
- Deliver the digital file and/or printed copy in the format the receiving body states it accepts.
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. National Accreditation Authority for Translators and Interpreters (NAATI), Australia · 2026-08-10 · source
Common reasons a NAATI translation is sent back
- Not every page and element was translated
- A certified translation must reflect the whole document — seals, signatures, reverse-side text and annotations. Omitting any of these usually triggers a request to redo it.
- Name spelling differs from the passport
- Australian bodies match the name in the translation to the passport. Where transliteration differs, give the translator the passport spelling before work starts.
- The translator is not certified in the language direction used
- NAATI credentials are tied to a specific language pair and direction; work outside the practitioner’s credential does not count as a certified translation.
- The source scan is too poor to read the seals
- If the image is unclear the translator must mark text as illegible, leaving gaps the destination may not accept. Re-scan from the physical original at high resolution.
National Accreditation Authority for Translators and Interpreters (NAATI) · 2026-08-10 · source
What to watch next time
- Auditing the source set before ordering translation saves more time than translating and re-doing.
- Use one romanisation of each name, taken from the passport, across every document.
- Scan quality directly determines how complete the translation can be.
Questions this case raises
- What makes a NAATI translation acceptable?
- It must be produced by a NAATI-certified translator and carry the translator stamp showing the certification number and translator details.
- Does the original need legalization before translation?
- It depends on the receiving authority. Some accept a NAATI translation with a copy of the original; others require the original to be legalized as well. Confirm the destination requirement first.
- How do I send documents from outside Bangkok?
- Send high-resolution scans to start, and forward originals or certified copies by trackable post or courier when they are needed.
- Can your team audit the whole set for me?
- Yes. We audit before translating, flag what has to be re-issued, fix the name mapping and see it through to delivery so you avoid rework.
Would rather not run this yourself?
We act as advisers from the first document review: we map which authority must sign in which order, prepare the file, and courier it for you. Fifteen-plus years of certification and legalisation work means we flag the usual rejection points before submission, not after.
Related reading
Last reviewed: 2026-08-11