Do I need NAATI translation for Australian visa from Thailand?

Yes. Australian Department of Home Affairs requires NAATI-certified translation for any non-English document (Thai birth, marriage, divorce, ID, education, police clearance). Professional fees are quoted after the documents and required steps are reviewed.
Detailed Answer
The Australian Department of Home Affairs (DoHA), Universities Admissions Centre (UAC), AHPRA (health practitioners), and most Australian state authorities require translations to be performed by a NAATI-credentialed translator (Certified Translator or Certified Provisional Translator). For applicants in Thailand, NPT works with NAATI-credentialed Thai↔English translators and provides translation for: birth/marriage/divorce certificates, household registration (Tabien Baan), Thai ID, passport bio page, academic transcripts and diplomas, Thai Police Clearance Certificate, bank statements, employment letters, and statutory declarations. Each page carries the translator's NAATI number, signature, and date — directly accepted by DoHA for partner visas (subclass 309/100/820/801), skilled visas (189/190/482/186), student visas (500), and visitor visas (600). Professional fees are quoted after the documents and required steps are reviewed.
