Sworn Translation vs Certified Translation, Explained

A sworn translation is produced by a translator who has been officially appointed or authorised, usually by a court or a ministry, and who signs and stamps the work so that public bodies accept it as accurate. A certified translation is the looser relative: a translator or agency attaches a signed statement saying the translation is complete and correct. Which one you need depends on the country that will read the document, and choosing the wrong kind is a frequent reason for a returned application.

Three terms that sound alike

Sworn translation

Many countries with civil-law systems keep an official register of translators. Spain, France, Germany and Poland are well-known examples, each with its own title for the role and its own rules for joining. A translator on such a register has passed an exam or a vetting process and uses a personal seal, and the finished translation carries legal weight without any extra step. Some authorities insist that the stamp comes from a translator registered in their own country; others accept a sworn translator from abroad.

Certified translation

Countries without a sworn-translator system, including the United States and the United Kingdom, usually rely on certification instead. The translator or company adds a signed declaration that they are competent in both languages and that the text matches the original. In most cases no state register stands behind that statement. Immigration offices in these countries commonly accept this format as long as the declaration names the translator and includes a signature, a date and contact details.

Notarized translation

Here a notary public watches the translator sign the accuracy statement. The notary checks the translator's identity, not the quality of the language. Some receiving offices ask for this extra layer and many do not. It never replaces a sworn translation where one is required.

Side by side

Type	Who produces it	What makes it official	Where it is common
Sworn	A translator on an official register	The translator's appointment, seal and signature	Many continental European and Latin American countries
Certified	Any qualified translator or agency	A signed statement of accuracy and competence	The US, the UK and other common-law countries
Notarized	A translator, plus a notary as witness	The notary's confirmation of who signed	Requested case by case

Which one will you need?

The receiving authority decides, so the first job is to ask it rather than guess. Useful questions to put to the office:

• Which language should the translation be in, and does it accept a bilingual layout?
• Does it want a sworn, certified or notarized version?
• Must the translator be registered in its own country?
• Should the translation be physically bound to the original or to a certified copy?
• Will a digitally signed file do, or does it need paper with an ink stamp?

Getting a birth certificate translated

A certified translation of a birth certificate is one of the most common requests in any move, because the document underpins visas, school places and family registrations. A smooth run usually looks like this:

1. Order a recent certified copy from the civil registry; older or damaged copies can be refused.
2. Add an apostille or authentication if the destination requires one.
3. Send the whole thing for translation, including stamps, handwritten notes, marginal remarks and the apostille.
4. Give the translator the spelling of every name exactly as it appears in each passport, so the papers match.
5. Keep the original, the translation and scans of both in the same folder.

The order matters. If the translation is done before the apostille is attached, the certificate ends up untranslated and you may have to pay twice. Our article on apostille vs authentication explains that earlier step. Occasionally the finished translation needs its own certification as well, so ask before you book.

Choosing a translator

• Where a sworn translation is needed, check the official register; justice ministries and courts in many countries publish one.
• Ask to see the format of the declaration or stamp before you commit.
• Confirm the turnaround time and whether postage of paper originals is included.
• Avoid machine translation for official papers; it is not accepted where a sworn or certified version is required.
• Keep the translator's details in case the office has a question later.

Quick questions

Can I translate my own documents?

For official use, most authorities expect an independent translator, and many rule out applicants translating their own papers even when they are fluent. Check the receiving office's guidance before trying.

Does a translation expire?

The translation itself has no expiry date, but the document underneath it may need to be recent. Some offices also want the translation to be dated within a set period, so avoid ordering everything too early.

What about a CV or cover letter?

Job applications are different. Employers want clear, natural writing in their language rather than a stamped document. Our guide to writing a cover letter that gets read covers that side, and the wider sequence of a relocation is set out in our step-by-step guide to moving abroad.

Requirements vary between countries and change over time. For anything with legal consequences, confirm the details with the receiving authority or a qualified professional before you pay for translation.