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    NAATI certified translation: documents, steps and cautions คืออะไร?

    NAATI certified translation requires the correct source records first, then certification in a fixed order, and finally a format the receiving authority accepts. This guide lists 18 document types handled in this category, the 5-step workflow, the 18 rejection causes we check for, and 12 receiving authorities with their own published requirements. Typical working time falls within 1–2 business days, excluding authority queues.

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    NAATI certified translation — document list, workflow and cautions

    NAATI certified translation requires the correct source records first, then certification in a fixed order, and finally a format the receiving authority accepts. This guide lists 18 document types handled in this category, the 5-step workflow, the 18 rejection causes we check for, and 12 receiving authorities with their own published requirements. Typical working time falls within 1–2 business days, excluding authority queues.

    Key facts at a glance

    Key facts at a glance
    Service categoryNAATI certified translation
    Document types covered18 types (see the table below)
    Workflow steps5 sequential steps
    Receiving authorities referenced12
    Applicant situations handledคนไทยในประเทศไทย, คนไทยในต่างประเทศ, ชาวต่างชาติในประเทศไทย, ชาวต่างชาติในต่างประเทศ, นิติบุคคล / องค์กร
    Typical working time1–2 business days / 2–3 business days / 3–5 business days / 5–7 business days
    FeesQuoted per document set by our staff (phone / LINE / email)

    Documents handled in this category, and what goes wrong with each

    Documents handled in this category, and what goes wrong with each
    DocumentWhat commonly goes wrongHow we handle it
    Thai birth certificateRomanised name on the birth certificate differs from the passport spelling.Adopt the passport spelling and attach a translator's note explaining the transliteration variance.
    House registrationMultiple move-in/move-out entries must all be rendered, not summarised.Translate every field including registrar stamps and signatures, with stamp positions annotated.
    Thai national ID cardBoth faces of the card, including the back reference number, must be translated.Produce a single two-sided translation and state that it derives from a colour copy.
    Marriage certificate and marriage registrationReceiving authorities usually require both the certificate and the registration record.Audit the set before translating and advise which record to request from the district office.
    Divorce certificate and divorce agreementCustody wording in the divorce agreement must be rendered literally.Translate literally without interpretation and preserve the original clause numbering.
    Death certificateCause-of-death wording uses clinical terminology requiring careful equivalents.Use standard clinical equivalents and retain the Thai source term in brackets.
    Change of first name certificateThe former and current names must be traceable for the receiving authority.Translate the name-change record alongside every document bearing the former name.
    Change of surname certificatePost-marriage surname does not match academic records.Assemble a linking chain of marriage, surname change and academic records.
    Degree certificateThe English programme title on the degree differs from the transcript.Follow the institution's official title and note the discrepancy in the translation.
    Academic transcriptGrades and credits must be preserved, not converted to a foreign scale.Reproduce the grade table row by row without performing any grade conversion.
    Certificate of graduationThe completion date differs from the issue date on the certificate.Present both dates separately and clearly in the translation.
    Nursing professional licenceThe registration number and expiry date must be plainly legible.Mirror the placement of the registration number and expiry in the translation.
    Medical practitioner licenceThe issuing council's official English name must be used.Use the council's official English name as published on its own website.
    Employment reference letterThe Thai job title has no exact equivalent in the destination occupation list.Translate literally and retain the duty description exactly as written in the source.
    Payslip or salary certificateDeduction lines use employer-specific abbreviations.Retain the abbreviation and add a bracketed gloss only where the source defines it.
    Company affidavit from DBDDirectors and signing authority clauses must be translated in full.Render the signing-authority clause literally and keep the original name order.
    Power of attorneyThe granted powers must not be summarised or abridged.Translate every paragraph and keep clause numbers aligned with the source.
    Parental consent for a minor to travelLegal guardianship must match the civil registration records.Pair the translation with the birth certificate and house registration to evidence the relationship.

    The workflow, step by step

    1. Step 1: Source completeness check. We confirm this step is complete and correctly evidenced before the file moves on.
    2. Step 2: Translation by a NAATI-certified practitioner. We confirm this step is complete and correctly evidenced before the file moves on.
    3. Step 3: Two-stage proofreading. We confirm this step is complete and correctly evidenced before the file moves on.
    4. Step 4: Certified output with stamp. We confirm this step is complete and correctly evidenced before the file moves on.
    5. Step 5: PDF delivery. We confirm this step is complete and correctly evidenced before the file moves on.

    Method and practical guidance

    Cautions before you lodge

    Receiving authorities and official references

    Frequently asked questions and answers

    What goes wrong most often with Thai birth certificate in this category?

    Romanised name on the birth certificate differs from the passport spelling. This is why we audit the record before any certification step: Adopt the passport spelling and attach a translator's note explaining the transliteration variance. Handled at the start, it costs one review; discovered by the receiving authority, it usually means re-issuing the record and repeating every certification after it.

    What goes wrong most often with House registration in this category?

    Multiple move-in/move-out entries must all be rendered, not summarised. This is why we audit the record before any certification step: Translate every field including registrar stamps and signatures, with stamp positions annotated. Handled at the start, it costs one review; discovered by the receiving authority, it usually means re-issuing the record and repeating every certification after it.

    What goes wrong most often with Thai national ID card in this category?

    Both faces of the card, including the back reference number, must be translated. This is why we audit the record before any certification step: Produce a single two-sided translation and state that it derives from a colour copy. Handled at the start, it costs one review; discovered by the receiving authority, it usually means re-issuing the record and repeating every certification after it.

    What goes wrong most often with Marriage certificate and marriage registration in this category?

    Receiving authorities usually require both the certificate and the registration record. This is why we audit the record before any certification step: Audit the set before translating and advise which record to request from the district office. Handled at the start, it costs one review; discovered by the receiving authority, it usually means re-issuing the record and repeating every certification after it.

    What goes wrong most often with Divorce certificate and divorce agreement in this category?

    Custody wording in the divorce agreement must be rendered literally. This is why we audit the record before any certification step: Translate literally without interpretation and preserve the original clause numbering. Handled at the start, it costs one review; discovered by the receiving authority, it usually means re-issuing the record and repeating every certification after it.

    What goes wrong most often with Death certificate in this category?

    Cause-of-death wording uses clinical terminology requiring careful equivalents. This is why we audit the record before any certification step: Use standard clinical equivalents and retain the Thai source term in brackets. Handled at the start, it costs one review; discovered by the receiving authority, it usually means re-issuing the record and repeating every certification after it.

    What goes wrong most often with Change of first name certificate in this category?

    The former and current names must be traceable for the receiving authority. This is why we audit the record before any certification step: Translate the name-change record alongside every document bearing the former name. Handled at the start, it costs one review; discovered by the receiving authority, it usually means re-issuing the record and repeating every certification after it.

    What goes wrong most often with Change of surname certificate in this category?

    Post-marriage surname does not match academic records. This is why we audit the record before any certification step: Assemble a linking chain of marriage, surname change and academic records. Handled at the start, it costs one review; discovered by the receiving authority, it usually means re-issuing the record and repeating every certification after it.

    Does Australian Department of Home Affairs accept the same format as other authorities?

    Not necessarily. Australian Department of Home Affairs publishes its own requirement, so we read it before preparing the set and match the certification chain to it. Where the requirement is silent, we prepare to the stricter of the two formats so the same set stays usable if the file is later submitted elsewhere. Reference: immi.homeaffairs.gov.au — translation requirements.

    Does AHPRA — Australian Health Practitioner Regulation Agency accept the same format as other authorities?

    Not necessarily. AHPRA — Australian Health Practitioner Regulation Agency publishes its own requirement, so we read it before preparing the set and match the certification chain to it. Where the requirement is silent, we prepare to the stricter of the two formats so the same set stays usable if the file is later submitted elsewhere. Reference: ahpra.gov.au — registration documents.

    Does VETASSESS skills assessment accept the same format as other authorities?

    Not necessarily. VETASSESS skills assessment publishes its own requirement, so we read it before preparing the set and match the certification chain to it. Where the requirement is silent, we prepare to the stricter of the two formats so the same set stays usable if the file is later submitted elsewhere. Reference: vetassess.com.au — document requirements.

    Does Australian Computer Society skills assessment accept the same format as other authorities?

    Not necessarily. Australian Computer Society skills assessment publishes its own requirement, so we read it before preparing the set and match the certification chain to it. Where the requirement is silent, we prepare to the stricter of the two formats so the same set stays usable if the file is later submitted elsewhere. Reference: acs.org.au — skills assessment.

    Can I prepare everything myself?

    You can. The work is the sequencing: 5 steps, each at a different counter with its own opening hours, and a document accepted at one step can still be rejected at the next. If you would rather not manage that, send us the set once and our team runs the whole chain and reports at each step.

    Do you only process documents, or do you advise as well?

    Both. Our team has worked on document certification for more than 15 years, and most cases are decided before the first counter visit: which record to request, which office issues it, what order the certifications go in, and whether a step is needed at all. We review your case and tell you what your file is missing before you commit to anything.

    How long does it take?

    Typical working time is 1–2 business days / 2–3 business days / 3–5 business days / 5–7 business days, excluding the receiving authority's own queue, which we cannot control and never guarantee. We confirm the realistic range for your case after seeing the actual document set.

    Would you rather we handled all of it?

    Send us the document set and tell us who receives it. We confirm the current requirement, run every certification step in the correct order, keep you updated at each step and deliver the finished set back. Our team also advises on the wider case, not just the one document. Fees are quoted per document set by our staff (phone / LINE / email).

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