Electronic Signature vs Handwritten: What Does French Law Say?

Does an electronic signature have the same legal value as a handwritten signature? The question comes up repeatedly 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 stakes — requires a detour through the Civil Code, the eIDAS regulation, and a few recent court decisions. This comprehensive guide takes stock in 2026.

The Principle: Article 1367 of the Civil Code

Since the law of March 13, 2000 (transposing Directive 1999/93/EC), French law recognizes electronic signatures. Article 1367 of the Civil Code, as amended by the ordinance of February 10, 2016, provides: "The signature necessary for the completion of a legal act identifies its author. It manifests his consent to the obligations that result from that act. When it is electronic, it consists in the use of a reliable process of identification guaranteeing its link with the act to which it attaches. The reliability of this process is presumed, until proof to the contrary, when the electronic signature is created, the identity of the signatory is assured and the integrity of the act is guaranteed, under conditions set by decree in the 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 Evidence

The European regulation eIDAS (EU 910/2014) defines three levels of electronic signature. Simple electronic signature (SES): Article 25.1 — cannot be refused in court merely because it is electronic, but the burden of proving reliability falls on the one relying on it. Advanced electronic signature (AES): Article 26 — uniquely linked to the signatory, allows their identification, created with means under their 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

Concretely, in case of dispute: if you have an authentic handwritten signature, it is up to the one who contests it to prove it is false. If you have a qualified electronic signature (QES), same rule (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 elements (timestamp, IP, metadata, signatory behavior). In all cases, the electronic signature is admissible.

Recent Jurisprudence

Several recent court decisions confirm the validity of electronic signatures in France. Cass. 1st civ. March 16, 2022 No. 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 evidence of identification. CE Dec. 9, 2021 No. 445019: the Council of State accepts electronic signatures for public procurement, compliant with Decree 2017-1416. The jurisprudential trend is clear: properly implemented AES electronic signatures are enforceable in the same way as handwritten signatures.

Cases Where Handwritten Signature Remains Mandatory

Limited exceptions (Article 1175 of the Civil Code): private agreements relating to family law (prenuptial agreement, civil partnership — except recent dematerialized civil partnerships), real and personal securities of a civil nature (personal guarantee for a loan outside a professional context), certain donations. And authentic acts (real estate sales, notarized donations) that require either physical presence at a notary's office or a qualified signature at an equipped notary's office. Traditional handwritten signatures are also necessary for certain social formalities (e.g., resignation in some contexts).

The Pitfall of Scanned Signatures

Beware: an image of a handwritten signature scanned and then pasted onto a PDF is NOT an electronic signature within the meaning of eIDAS. It provides no guarantee of identification or integrity. Legally, it is at best considered as circumstantial evidence, easily refutable. Many companies think they are compliant because they have used 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

Full-time employment, fixed-term employment, amendments: AES minimum (OTP email + SMS ideal). Residential lease, commercial lease: AES recommended, QES for large commercial leases. NDA, confidentiality agreement: SES acceptable for a standard NDA, AES for highly sensitive information. Quote, purchase order, invoice: SES is sufficient. Attorney act (66-3-3): QES mandatory. Notarial act: QES mandatory at an equipped notary's office. Certyneo offers SES and AES that cover 95% of a company's needs.

Conclusion: Legal Equivalence, with Technical Nuances

Electronic signatures have exactly the same legal value as handwritten signatures — provided they are properly implemented. The key word: "reliable process." For a contract with significant stakes, do not skimp on the level (AES rather than SES), use an eIDAS-compliant platform, and preserve the audit trail for a minimum of 10 years. To learn more, consult our complete eIDAS guide (/guide/eidas) or our article on eIDAS compliance for SMEs (/blog/conformite-eidas-pme-checklist).