Certified, Sworn & Notarised Legal Translation, Explained
"Certified translation" gets used as a catch-all term, but legal documents don't all need the same treatment. What a family court expects from an affidavit is different from what a business needs for a contract, and different again from what notarised legal translation NZ registries expect from a will. Here's what actually applies, so you're not paying for a certification tier your document doesn't need.
What Is a Sworn Translation and When Do You Need One?
A sworn translation goes a step beyond standard certification — the translator formally affirms, in front of a Justice of the Peace, that the English version is a true and complete rendering of the original. New Zealand courts typically expect this for affidavits, statutory declarations and witness statements, since these documents are being submitted as evidence rather than as general supporting paperwork. If you're unsure whether your specific filing needs a sworn translation, tell us where it's headed and we'll confirm it before quoting a price.
Certified vs Sworn vs Notarised vs Apostille — What's the Difference?
These four terms get used interchangeably, and mixing them up is one of the more common reasons a legal document gets sent back for correction. A certified translation carries the translator's signed accuracy statement. A sworn translation adds a formal affirmation before a Justice of the Peace, usually for court use. Notarisation is a separate step where a Notary Public authenticates a document, and an apostille is a further layer of international authentication under the Hague Convention, typically needed when a New Zealand document is going overseas.
Treat this as a general guide rather than a final answer — we confirm your exact requirement before quoting a price.
Documents We Translate for Legal Use
Which certification level applies depends entirely on the document and where it's headed. Whether you're searching for court document translation NZ, affidavit translation, or contract translation in New Zealand, the same standard applies — a complete, accurate translation, not a summary. These document types come up most often across our legal translation work:
- Affidavits and statutory declarations — evidence for family and civil court matters
- Court orders, judgments and pleadings — for use in NZ or overseas proceedings
- Commercial contracts and agreements — for business and legal review
- Power of attorney and authorisation documents — for property and financial matters
- Wills, deeds and estate documents — for probate and inheritance purposes
- Foreign driving licences and identity documents — for legal recognition in NZ
- Corporate documents and company registrations — for cross-border business use
If your document isn't on this list, send it across anyway. We'll tell you honestly whether certified legal document translation applies before you're quoted a price.
Confidentiality on Sensitive Legal Documents
Legal paperwork often carries information most people would rather keep contained — financial details in a contract, personal circumstances in an affidavit, or commercially sensitive terms in a business agreement. Every legal translation is handled by your assigned translator and one internal reviewer only, files move through secure file transfer rather than open email threads, and everything is cleared from our systems once your translation is delivered. A confidentiality agreement is available on request for law firms and businesses that need one on file.
Legal Translation Services in Auckland, Wellington & Christchurch
NZ Translations is based in Auckland and works with individuals, law firms and businesses across the whole country. Submission is entirely online, so it makes no difference whether your matter is being heard in Auckland, Wellington, or Christchurch — send your document through the form, WhatsApp, or email, and a legal-specialist translator takes it from there.
Translating Contracts for New Zealand Businesses
Contract translation in New Zealand carries its own risk if handled loosely — a mistranslated clause can change what a party is actually agreeing to. Our commercial contract translations go to translators with genuine legal-industry background, not general-purpose staff, and every term is checked for consistency across the whole document rather than translated line by line in isolation.