Faxes and evidence under French law

Articles 1358, 1366 and 1379 of the French Civil Code, read from a fax user's point of view.

A fax can be put before a French court: Article 1358 of the Civil Code accepts any form of evidence unless a statute provides otherwise. The real question lies elsewhere: what does it actually show? A fax is a copy. Article 1379 gives a copy the same weight as the original if it is reliable, and reliability is for the judge to assess. The transmission report confirms that a connection was made to a specific number, with a timestamp and a page count. It tells you nothing about the exact wording on those pages, or about who picked them up from the tray. And as soon as a statute or contract requires a specific form (a signed document above €1,500, registered mail, a notarised deed), a fax on its own will not do.

Three Civil Code rules worth knowing

Article 1358: any means of proof is admissible, unless the law requires something else. That is the entry point. A fax gets through it just as a photo, an email or a witness statement would. For transactions between traders, Article L110-3 of the French Commercial Code points the same way.

Articles 1359 to 1362: for a legal act involving a sum or value above €1,500 (an amount set by decree), written proof is required. A fax standing alone then counts, at best, as a 'beginning of written proof' (Article 1362): it makes the claim plausible but has to be backed up by something else, such as a witness, circumstantial evidence or later correspondence.

Articles 1366 and 1379: the first gives electronic writing the same weight as paper, provided its author can be identified and its integrity is safeguarded from creation through storage. The second deals with copies: a reliable copy is worth the original, and reliability is a matter for the judge. The presumption of reliability laid down by decree requires technical safeguards (digital fingerprint, timestamp, archiving) that an ordinary fax does not provide. A fax received on paper falls mainly under the copy rules; one received as a file also raises the Article 1366 questions.

The transmission report, line by line

Before relying on a fax, it helps to know what its report really says. Here are four common assumptions, tested against what the document actually contains.

  • What it confirms: a successful connection

    Number dialled, date, time, duration, page count, an 'OK' status: these details come from the handshake between the two machines, with the remote fax confirming each page it received. The sender cannot conjure them up with a click, unlike a screenshot.

  • What it does not show: the text sent

    A report says '3 pages', not which ones. Some machines print a thumbnail of the first page; that is a clue, rarely enough. The link between report and document has to be built separately, with the archived copy, the cover page and cross-references.

  • What it does not show: that anyone read it

    A shared fax in a hallway can print pages with nobody looking. The report stops at the output tray. It covers neither internal distribution, nor reading, nor the moment the right person found out.

  • What it does not show: who wrote it

    The header ID can be set freely on most machines, and a scanned signature is just an image. Tying content to a person takes other evidence, which is exactly the identification requirement Article 1366 sets for electronic writing.

Four situations where a fax does not meet the requirement

Registered mail is mandatory
Notice to end a residential lease, notifications defined in a contract, formal demands that must take this form: when the rule names registered mail with proof of delivery (or its qualified electronic equivalent), no other channel stands in for it, however fast.
A notarised deed or formal requirement
Property sales, gifts, marriage contracts: these go through a notary. How a document is transmitted makes no difference to that formality. Neither a fax nor a PDF can replace it.
Over €1,500 with nothing else
A commitment above the threshold calls for a signed document. A fax can act as a beginning of written proof, provided something else supports it: a bank transfer, correspondence, partial performance, witnesses.
A deadline to start or to meet
When a right hinges on the date of receipt (notice periods, challenges, appeals), that date is what you will need to prove, and it is easy to dispute if all you hold is a sending report. A channel whose date is binding by design is the safer choice.

Building a solid file around a fax

  1. File everything on the same day

    The exact PDF, the proof of transmission and the cover page, stored under one name or in one folder. With FaxTelecom, the PDF receipts option (€2.99 incl. VAT, billed solely when delivery succeeds) gives you one dated document for the request and another for the transmission.

  2. Let the document state its page count

    Add 'page 1/4' in the footer, a precise subject line and a reference (case or invoice number) on the cover page. The figure on the report then matches an identifiable set of pages.

  3. Leave a trace on the recipient's side

    A call logged in your diary, an email such as 'I faxed you our quote no. 2026-118 this morning, 4 pages', or a written reply from the recipient often carry more weight than the report itself: they come from a third party, or prompt one to respond.

  4. Use fax for what it does well

    When the stakes are high, use the form the law or contract prescribes, and keep fax as a backup or for the people who insist on it. A strong file combines channels rather than betting everything on one.

Your questions about fax as proof

Is a fax accepted as evidence in France?
In principle, yes: Article 1358 of the Civil Code opens proof to any means unless the law says otherwise. What remains uncertain is how much it weighs. The judge assesses that according to what has to be proved, any formal requirements and the other evidence produced.
Can I cancel a contract by fax?
It depends on the contract and the applicable law. If registered mail with proof of delivery is required, a fax does not replace it. If no form is imposed, a fax may be fine, but you will need to show it was received: arrange a confirmation through another channel. Reread the termination clause before sending.
Is a transmission receipt the same as a proof of receipt?
It confirms that the remote machine accepted a stated number of pages, and when. That is proof of technical delivery, not of reading, and it does not describe the content. Paired with the copy you sent and a cover page announcing the page count, it becomes far more convincing.
Is a contract signed and returned by fax valid?
A contract can be formed by agreement alone, unless the law requires a specific form. But a signature received by fax is a reproduction: it is neither an original nor an electronic signature meeting Article 1367. If challenged, it will be worth whatever the judge decides. For a significant commitment, ask for the original or an electronic signature, and get advice.

Where to go next

Hand-picked pages to help you prepare, send or prove your fax.

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