Glossary · Business management

Electronic signature: what is valid, and for what

5 min read · Updated on 3 July 2026
Definition Electronic signature is a cryptographic process that demonstrates the signatory’s consent to a digital document and guarantees its integrity after signing. Governed in Europe by the eIDAS regulation, it has the same legal validity as a handwritten signature — provided the correct level (simple, advanced or qualified) is used for the right type of document.
The full entry
The essentials in brief
  • Legally valid in France since 2000 (Art. 1366-1367 of the Civil Code) and harmonised in Europe by the eIDAS regulation.
  • 3 levels: simple (SES), advanced (AdES), qualified (QES) — the presumption of reliability only applies to qualified.
  • For 95% of SME use cases (quotes, commercial contracts, T&Cs), advanced signatures are more than sufficient.
  • What matters in court: the audit trail (verified identity, timestamp, document integrity).
  • A scanned signature pasted into a PDF is NOT an electronic signature — it’s just an image, with no probative value of its own.
I The levels

The 3 eIDAS levels, and which to choose

LevelGuaranteesTypical uses
Simple (SES)Basic consent (checked box, light SMS code)Internal use, low-stakes documents
Advanced (AdES)Signer identity linked, detects any changes, audit trailQuotes, commercial contracts, purchase orders, employment contracts, leases
Qualified (QES)Identity verified in person (or equivalent), qualified certificate, ANSSI-audited providerDematerialised notarial deeds, certain public contracts, legal acts

The practical SME rule: Advanced covers the vast majority of needs—it’s the default level offered by serious platforms (identity verification via email + SMS OTP, on-the-fly certificate, timestamped evidence file). Qualified, which is heavier (enhanced identity verification) and more expensive, is only required for specific acts.

What actually gives probative value: the evidence file generated with each signature—who signed (identity, email, phone), how identity was verified, when (qualified timestamp), and the cryptographic guarantee that the document hasn’t changed by a single byte. In court, this file makes the difference—not the signature image on the last page.

What about scanned signatures? Pasting a handwritten signature image into a PDF provides none of the above guarantees: no verified identity, no integrity, no timestamp. In case of dispute, its value is almost zero. Yet it’s still the majority practice in VSEs—and the first habit to correct.

2000
electronic signatures have been legally valid in France for 26 years
3
eIDAS levels — Advanced (AdES) covers ~95% of SME needs
× 3-5
quote signing rate: electronic signature vs "print-scan"
II The impact

How it changes the sales cycle

Beyond the legal aspect, electronic signature is first and foremost a commercial accelerator: a quote signable in two clicks from a phone gets signed the same day; a quote that needs printing, signing and scanning waits for the weekend, second opinions, or competitors. Platforms report signing delays divided by 3 to 5—and every day of delay is one less opportunity for the customer to reconsider.

Best integration practices:

  • Sign from the management tool (quote → signature → order → invoice in the same workflow) rather than exporting to a standalone platform: document status follows the deal, unsigned quote reminders automate, and the signed document archives with its evidence file.
  • Ordered multi-signatories: the quote signed by the client THEN countersigned by the manager, each notified in turn.
  • Automatic reminders for unsigned documents: at D+3 and D+7—same logic as invoice reminders, same effects.
  • Evidence file archiving: the signed PDF alone isn’t enough; keep the certificate and audit trail provided by the platform (10 years, like the document itself).

For feature details (eIDAS simple electronic signature, multi-signatories, integration with the quote-invoice cycle), see the Orizen electronic signature product page; and for choosing a market platform, our dedicated comparison on the blog.

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Golden rule
The winning SME combo: quote sent with a signature link + auto-reminder at D+3. It’s the sales cycle change with the best effort/impact ratio—just a few minutes of setup, days of signing delays saved on every deal.

What if a tool handled this for you?

Discover the Orizen answer: Orizen electronic signature: integrated eIDAS simple signature, modular and built for French SMEs.

Essai gratuit 14 jours What the Orizen electronic signature: integrated eIDAS simple signature module costs
III Frequently asked questions

Answers to the questions we get asked most.

Is an electronic signature valid for an employment contract?

Yes — permanent contracts, fixed-term contracts, amendments and mutual terminations can all be signed electronically (advanced level recommended), and the practice is now widespread in HR. A few acts remain exceptions: those requiring notarial formalities (e.g. property sales) must use the notary’s qualified signature; and some documents “handed over in person against discharge” require careful attention to the process. For all standard HR documents in an SME, advanced signature with an evidence file is robust and proven in employment tribunals.

What happens if the client disputes having signed?

This is where the chosen level matters. With advanced signature, the evidence file establishes: the signatory’s email and phone number (with the OTP code entered), IP address, qualified timestamp, and the document’s cryptographic integrity. The burden of proof shifts heavily to the signatory — courts regularly uphold these files. With simple signature (checkbox without identity verification), the evidence is weaker; with qualified signature, reliability is presumed by law and the challenger must prove otherwise.

How much does electronic signature cost for an SME?

On a dedicated platform: €10–40/user/month depending on the level and volume, or envelope-based packs (€1–3 per signature). When integrated into management software (e.g. quotes signed directly from the tool), it’s often included or charged per document — more cost-effective if you sign quotes weekly, and functionally superior (status tracking, reminders, archiving linked to the deal). The maths is simple: one quote signed earlier thanks to a smooth process can cover a year’s subscription.

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