Electronic signature vs handwritten: what does French law say?

Does an electronic signature have the same legal value as a handwritten signature? The question keeps coming up in law firms and business discussions. The short answer: yes, provided certain technical and regulatory criteria are met. The long answer — the one you need to master before signing a contract with significant implications — requires a detour through the Civil Code, the eIDAS regulation and some recent court decisions. This comprehensive guide takes stock in 2026.

The principle: article 1367 of the Civil Code

Since the law of 13 March 2000 (transposing Directive 1999/93/EC), French law recognises electronic signatures. Article 1367 of the Civil Code, amended by the ordinance of 10 February 2016, provides: "A signature necessary for the perfection of a legal act identifies its author. It manifests his consent to the obligations arising from that act. When it is electronic, it consists of the use of a reliable identification procedure guaranteeing its link with the act to which it is attached. The reliability of this procedure is presumed, unless proven otherwise, when the electronic signature is created, the identity of the signatory is assured and the integrity of the act is guaranteed, under conditions laid down by decree in Council of State." This text is fundamental: it places electronic and handwritten signatures on an equal legal footing.

The 3 eIDAS levels: a hierarchy of proof

The European eIDAS regulation (EU 910/2014) defines three levels of electronic signature. Simple electronic signature (SES): article 25.1 — cannot be refused in court on the sole grounds that it is electronic, but the burden of proving reliability lies with the person relying on it. Advanced electronic signature (AES): article 26 — uniquely linked to the signatory, allows his identification, created with means under his exclusive control. Qualified electronic signature (QES): article 25.2 — presumed equivalent to a handwritten signature, only QES benefits from this legal presumption.

What this means in practice

In the event of a dispute: if you have an authentic handwritten signature, it is up to the person who contests it to prove it is false. If you have a qualified electronic signature (QES), the same rule applies (presumption of reliability). If you have an AES, the judge will examine the technical evidence provided (certificate, audit trail, OTP). If you have an SES, you will need to produce more substantial evidence (time stamp, IP address, metadata, signatory behaviour). In all cases, the electronic signature is admissible.

Recent case law

Several recent court decisions confirm the validity of electronic signatures in France. Cass. 1re civ. 16 March 2022 n°20-21.585: the Court of Cassation validates a contract signed electronically via a SaaS platform at AES level, considering that the audit trail provided sufficient proof of identification. CE 9 Dec. 2021 n°445019: the Council of State accepts electronic signature for public procurement, in compliance with decree 2017-1416. The case law trend is clear: correctly implemented AES electronic signature is enforceable in the same way as a handwritten signature.

Cases where handwritten signature remains mandatory

Restrictive exceptions (article 1175 of the Civil Code): private agreements relating to family law (marriage contract, civil partnership — except recently dematerialised civil partnerships), real and personal securities of a civil nature (guarantee by a natural person of a loan outside a professional framework), certain donations. And authentic deeds (property sale, notarised donation) which require either physical presence at the notary's office or a qualified signature at an equipped notary's office. Traditional handwritten signature is also necessary for certain social formalities (e.g. resignation in certain contexts).

The pitfall of scanned signatures

Beware: an image of a handwritten signature scanned and then pasted into a PDF is NOT an electronic signature within the meaning of eIDAS. It offers no guarantee of identification or integrity. Legally, it is at best considered as evidence, easily refutable. Many companies believe they are complying because they have been using this method for years without dispute — until the day a contract is challenged and the evidence collapses. See our dedicated article (/blog/signature-manuscrite-scannee-risques).

Recommendations 2026 by contract type

Permanent contract, fixed-term contract, amendments: AES minimum (email OTP + SMS ideal). Residential lease, commercial lease: AES recommended, QES for very large commercial leases. NDA, confidentiality agreement: SES acceptable for a standard NDA, AES for highly sensitive information. Quotation, purchase order, invoice: SES is sufficient. Lawyer's deed (66-3-3): QES compulsory. Notarial deed: QES compulsory at an equipped notary's office. Certyneo offers SES and AES which cover 95% of a company's needs.

Conclusion: legal equivalence, with technical nuances

Electronic signature has exactly the same legal value as handwritten signature — provided it is properly implemented. The keyword: "reliable procedure". For a contract with significant implications, do not skimp on the level (AES rather than SES), use an eIDAS-compliant platform, and keep the audit trail for at least 10 years. To find out more, consult our complete eIDAS guide (/guide/eidas) or our article on eIDAS compliance for SMEs (/blog/conformite-eidas-pme-checklist).