Are Electronic Signatures Legally Binding? The Law Explained (2026)

Are Electronic Signatures Legally Binding?

Yes. Electronic signatures are fully legally binding across the Netherlands and the wider European Union - provided they are 'sufficiently reliable' for the purpose for which they are used. A court may not deny a signature legal effect simply because it is electronic. This article explains exactly what the law says, the three signature levels, and which level you need when.

What does the law say?

Two rules form the foundation:

• eIDAS Regulation (EU 910/2014): European legislation that gives electronic signatures the same legal status across all 27 member states. Article 25 states that an electronic signature shall not be denied legal effect solely because it is in electronic form.
• Dutch Civil Code (Article 3:15a): an electronic signature has the same legal effect as a handwritten signature, provided the method used is 'sufficiently reliable', given the purpose for which the signature was used and all other circumstances.

The key lies in that term, 'sufficiently reliable'. Not every electronic signature is equally strong - and the law requires the level to match the importance of the document.

The three levels of electronic signatures

eIDAS distinguishes three levels. The higher the level, the stronger the evidence.

1. Simple Electronic Signature (SES)

The most basic form: a typed name, a ticked box, or a scanned signature. Fast and low-threshold, but the signer's identity is not verified. Fine for low-risk documents such as internal approvals, quotes, or house rules.

2. Advanced Electronic Signature (AES)

Uniquely linked to the signer and capable of identifying them. The signature is tied to the document so that any change after signing is detectable. Usually combined with verification via email, SMS, or a digital ID. The workhorse for most business contracts: employment agreements, partnership and supplier contracts, lease agreements.

3. Qualified Electronic Signature (QES)

The highest level. An AES created with a qualified certificate and a qualified signature-creation device, issued by a recognized trust service provider. A QES is legally equivalent to a handwritten signature throughout the EU and carries the strongest evidential value. Required for legally sensitive or heavily regulated documents.

Which level do you need when?

There is no statutory table prescribing a level per document - the standard is 'sufficiently reliable'. A practical rule of thumb:

• Low risk / high volume → SES: internal approvals, quotes, confirmations.
• Business contracts → AES: employment, lease, procurement, and partnership agreements. The standard level for most organizations.
• High risk / heavily regulated → QES: financial services, notarial and government processes, documents with major financial or legal impact.

When in doubt, choose one level higher. The extra evidential value costs little and pays off the moment it matters.

Exceptions: when is electronic (not yet) enough?

For a small number of documents, the law prescribes a paper or notarial form, such as:

• Wills and certain testamentary dispositions
• The transfer of a home or registered property (notarial deed)
• Some family-law deeds

For the vast majority of business documents, however, there is complete freedom of form - so electronic signing is both permitted and legally binding.

Evidential value: why the audit trail is decisive

Legal validity is one thing; in a dispute, evidential value counts. Can you prove who signed, when, and that the document was not altered afterwards? A professional signing platform captures this in a watertight audit trail: identity verification, timestamps, IP data, and a sealed document. That record is what makes the difference between a signature that holds up and one that is open to challenge.

How to make sure your signatures hold up

1. Choose the right level (SES/AES/QES) per document type.
2. Verify signer identity appropriate to the risk.
3. Keep a complete audit trail with every signed document.
4. Work with an eIDAS-compliant, European provider - so compliance and data storage are assured.
5. Document your policy: which document type requires which level?

Frequently asked questions

Is a scanned signature legally binding?

Yes, as a simple electronic signature (SES). However, its evidential value is limited because identity is not verified. For contracts of any importance, AES is wiser.

Can the other party dispute an electronic signature?

Disputes are always possible, just as with a wet signature. The difference: with a strong audit trail and a higher signature level, your legal position is far stronger.

Does this apply internationally?

Within the EU, recognition is arranged through eIDAS. Many countries outside it (US, UK) have comparable legislation, but always check local law for cross-border contracts.

Conclusion

An electronic signature is fully legally binding in the Netherlands and the EU - the question is not whether, but at which level. Choose the level that matches the importance of the document, secure a watertight audit trail, and work with a European, eIDAS-compliant partner.

Want to know which signature level fits your documents? Contact our experts or read more about legislation and compliance. You may also want to explore what changes with eIDAS 2.0.