Sworn translation: when is it actually required?
"Certified translation", "sworn translation", "official translation": three words for the same thing, and many documents that need none of them. Here is where the line falls in French law.
Published on 16/09/2026 · 6 min read · Manuce, document translation by specialists
What a sworn translator is
In France, a sworn translator is a court-appointed expert registered on the list of a court of appeal (or the Cour de cassation). They take an oath, affix their stamp and a unique registration number to the translation, and assume responsibility for its conformity with the source document. Their translation has official value before French administrations and courts.
It is neither a quality label nor a guarantee of style: it is a legal status. An excellent non-sworn translator will often produce a better text—they simply will not produce an opposable document.
Documents that almost always require it
As soon as a document drafted in a foreign language must be produced before a French administration, court, notary or civil registrar, sworn translation is the rule:
- civil status certificates: birth, marriage, death, family record book;
- judgements, court decisions, bailiff's acts, notarised powers of attorney;
- degrees and transcripts for equivalence or enrolment;
- criminal record, driving licence, residence permits;
- documents filed with the commercial court registry, incorporation documents for a subsidiary;
- adoption, succession, international divorce documents.
The same principle applies in reverse: a French document produced abroad generally requires a certified translation according to the rules of the destination country, sometimes accompanied by an apostille or legalisation, which authenticate the signature and not the translation.
Documents that do not require it
Between professionals, the vast majority of documents require no certification:
- commercial contracts, general terms and conditions, confidentiality agreements, purchase orders;
- reports, internal notes, minutes, presentations, correspondence;
- manuals, technical data sheets, instructions, catalogues, websites;
- financial documents intended for information purposes and not for official filing.
A contract signed between two companies produces its effects in the language the parties have chosen. What matters then is not a stamp, but the accuracy of the terms—and the clause that states which of the two versions prevails in the event of a discrepancy. Never forget this in a bilingual contract.
The most cost-effective method
A sworn translation costs 3 to 10 times the price of an ordinary translation and is measured in days. Having a 200-page file sworn-translated as a precaution when only 4 pages need it means paying for 196 pages at the premium rate.
The right sequence: first ask the receiving administration which specific documents it requires to be certified—the answer often fits on one line. Have those documents translated by a sworn translator. Have the rest translated normally, and quickly.
This is what we tell our clients, even when it costs us revenue: Manuce is not sworn and will not be. We prepare the file, an approved translator certifies the documents that must be.
What we're asked on this subject
Is a sworn translation valid abroad?
Not automatically. Each country recognises its own official translators. A French sworn translation is widely accepted in Europe, often accompanied by an apostille, issued since May 2025 by notaries. Outside the Union, check with the consulate of the destination country: some require a translator approved by their own embassy.
What is the difference between an apostille and a sworn translation?
The apostille authenticates the signature affixed to the original document; it says nothing about the translation. The two procedures are independent and sometimes cumulative: document apostilled, then translated by a sworn translator.
Where can I find a sworn translator?
In the directory of court experts of your local court of appeal, published by each court, or in the national directory of the Cour de cassation. Beware of platforms that promise instant online certification without naming the translator or their court of affiliation.
Can you prepare the translation and have it certified afterwards?
Yes, and it is often the most economical approach: the sworn translator reviews, corrects and certifies rather than translating everything. Ask them before you start whether they accept this method and at what rate—not all of them do.
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