Electronic power of attorney: legality, agent and representation

Introduction: dematerialised power of attorney, a major legal issue

Electronic power of attorney is progressively becoming the standard for modern legal representation. In a context where notarial deeds, management mandates, delegations of authority and banking signatures are executed remotely, the question of the legality of dematerialised mandates has become critical for any professional. In 2026, several regulatory developments — notably the revision of the eIDAS regulation and the French implementation of its provisions — have strengthened the applicable framework. This article explains the conditions for validity of an electronic power of attorney, the requirements imposed on the agent, the levels of signature permitted according to the type of act, and the best practices for securing legal representation within your organisation.

---

What is an electronic power of attorney? Definition and scope

Mandate in the digital age

A power of attorney (or mandate) is a legal act by which one person — the principal — entrusts another — the agent — with the authority to act on their behalf. French civil law governs this mechanism under articles 1984 to 2010 of the Civil Code. The dematerialisation of this act does not alter its legal nature: the agent remains bound by the same obligations of loyalty, diligence and accountability.

An electronic power of attorney is therefore a mandate whose formation, transmission and retention take place in digital form, with an electronic signature affixed by the principal. Its legal value is conditional on the level of signature used and the quality of the trust service provider (TSP) that issues the certificates.

Difference between special, general and specific powers of attorney

A special power of attorney authorises the agent to carry out a specific act (signing a lease agreement, representing a company at a general meeting). A general power of attorney grants extended representation, sometimes limited in time or amount. These distinctions matter in electronic law: the broader and more binding the power of attorney, the higher the level of signature required. A general power of attorney relating to acts of disposition over immovable property, for example, will require a qualified signature under eIDAS, or even an electronic notarial deed.

Sectoral fields of application

The sectors most affected by electronic power of attorney for agents are:

• Law firms and consultancies: delegation of signature on legal acts, representation in negotiations;

• Notariat: electronic authenticated powers of attorney for property transactions;

• Finance and banking: delegation of banking authority, SEPA mandates;

• Human resources: delegation of signature for employment contracts (see our guide on electronic signature for HR);

• Real estate: sale mandates, promises by power of attorney (see electronic signature in real estate).

---

Conditions of validity for an electronic power of attorney

The principle of functional equivalence

Article 1366 of the Civil Code establishes the founding principle: "An electronic document has the same evidentiary force as a document on paper, provided that the person from whom it originates can be duly identified and that it is established and retained under conditions designed to guarantee its integrity." This principle of functional equivalence means that a properly formed electronic power of attorney is legally enforceable in the same way as a paper document signed by hand.

However, this equivalence is not automatic. Three cumulative conditions must be met:

• Reliable identification of the principal: the signatory must be authenticated with certainty, via a digital certificate issued by a qualified trust service provider (QTSP).

• Integrity of the document: the content of the power of attorney must not have been altered after signature — this is guaranteed by the time-stamped cryptographic seal.

• Secure retention: legal archiving of the signed document and its evidence (audit log, signature certificate) must be ensured. For further information on this point, consult our guide on electronic time-stamping and its legal value.

Signature levels under eIDAS

Regulation (EU) No 910/2014 on eIDAS, as amended by Regulation eIDAS 2.0 (EU 2024/1183), distinguishes three levels of electronic signature:

For the vast majority of corporate powers of attorney, advanced electronic signature (AdES), compliant with ETSI standards EN 319 132 (XAdES) or EN 319 122 (CAdES), provides a sufficient level of security and robust enforceability. The legal value of the electronic signature therefore varies directly according to the level chosen.

The role of the agent in the signature process

The electronic power of attorney involves not only the signature of the principal, but potentially a counter-signature or acknowledgement of acceptance by the agent. Some platforms make it possible to formalise this acceptance through an electronic signature by the agent on the power of attorney act itself, thereby strengthening proof of agreement between the two parties. This best practice is particularly recommended for mandates lasting longer than 6 months or involving an amount exceeding €50,000.

---

Electronic power of attorney and legal representation: specific requirements

Delegation of authority within a company

A delegation of authority is a specific form of power of attorney, by which a manager transfers certain of their responsibilities to a subordinate. In business criminal law, this delegation is a mechanism for exonerating the business manager from liability. To be valid, it must be precise, effective and accepted by the delegatee.

When dematerialised, the electronic delegation of authority must satisfy the same substantive criteria, to which are added the formal requirements linked to digital signature. An advanced or qualified signature is here recommended by legal practitioners, in order to guarantee the authenticity of the delegation in the event of a dispute.

Mandates in the judicial and notarial sector

The notariat experienced a quiet revolution: since Decree No 2021-1384 of 25 October 2021, notaries may receive electronic authenticated acts from a distance (AAE-D). A notarised power of attorney can therefore be drawn up by videoconference, with the comparent signing from their home with a qualified certificate. This procedure is particularly used for property sales where the buyer or seller is abroad.

For ad litem mandates (representation in court), the formal rules depend on the courts: some tribunals accept electronically signed powers of attorney, others maintain the requirement for paper form. The applicable procedural rules should be checked on a case-by-case basis.

Risks linked to a poorly formed electronic power of attorney

An electronic power of attorney that does not comply with the legal conditions exposes the principal to several risks:

• Unenforceability of the act: the third party contractor may challenge the validity of the representation;

• Liability of the agent: if an act is accomplished without valid authority, the agent may be held personally liable;

• Evidentiary disputes: the absence of a reliable audit log makes it difficult to prove the identity of the signatory;

• GDPR penalties: if the power of attorney involves processing personal data of third parties without adequate legal basis.

To avoid these pitfalls, it is essential to rely on a compliant solution, listed on the ANSSI trust list. The Certyneo platform notably offers a complete guide to electronic signature solutions to help you choose the right level of security according to your needs.

---

Practical implementation: how to draft and sign an electronic power of attorney

Document structure for a solid electronic power of attorney

A well-drafted electronic power of attorney comprises the following elements:

• Complete identification of the principal and the agent (name, first name, capacity, contact details);

• Precise object of the mandate: acts authorised, representation limits, possible maximum amount;

• Duration of validity: start date, end date or termination condition;

• Substitution clause: possibility or otherwise for the agent to sub-delegate;

• Applicable law and competent jurisdiction in the event of a dispute;

• Electronic signature of the principal with qualified time-stamping.

Certyneo offers ready-to-use contract and power of attorney templates, compliant with French law and adaptable to your sector of activity.

Signature workflow for a multi-party power of attorney

In the case of a power of attorney involving multiple parties (principal, agent, witness or notary), the signature workflow must be rigorously configured:

• Document generation from a legally validated template;

• Secure transmission to the principal with strong authentication (OTP, FranceConnect+, qualified certificate);

• Signature of the principal with the appropriate level;

• Notification to the agent and possible counter-signature;

• Legal archiving with complete audit log (IP address, time-stamp, session identifier);

• Distribution of signed copies to the parties.

This process, entirely automatable via a signature API, reduces the average time for obtaining a power of attorney from several days to a few hours, according to data published by EEMA (European Association for e-Identity & Security) in its 2025 report.

Retention and archiving of electronic powers of attorney

The retention period for a power of attorney varies depending on its nature. Powers of attorney relating to immovable property acts must be retained for 30 years (general limitation period). Those relating to commercial acts, 5 years (art. L. 110-4 of the Commercial Code). Digital archiving with evidentiary value (NF Z42-020) guarantees the readability and integrity of documents throughout this period.

The page dedicated to power of attorney and mandate on Certyneo details the available templates and recommended retention conditions by type of act.

Legal framework applicable to electronic power of attorney in 2026

Founding texts of French law

The legal validity of the electronic power of attorney is based in the first place on the Civil Code, and more specifically:

• Article 1366: recognises the evidentiary force of the electronic document, subject to identification of the signatory and integrity of the document;

• Article 1367: defines the electronic signature as the use of a reliable process of identification guaranteeing the link between the signature and the act to which it attaches;

• Articles 1984 to 2010: govern the mandate contract in its substantive conditions (capacity, consent, lawful purpose) and formal requirements.

Decree No 2017-1416 of 28 September 2017 clarifies the conditions under which the electronic signature is presumed reliable, by referring to the criteria in the eIDAS regulation.

The eIDAS Regulation and eIDAS 2.0

Regulation (EU) No 910/2014 (eIDAS) constitutes the European foundation. It establishes a framework for mutual recognition of electronic signatures between Member States and creates the status of qualified trust service provider (QTSP). In 2026, Regulation eIDAS 2.0 (EU 2024/1183) is fully in force, introducing in particular:

• The European Digital Identity Wallet (EUDI Wallet), which enables strong identification of the principal without a physical smart card;

• Strengthened requirements for QTSPs in terms of operational resilience and cybersecurity (NIS2 alignment);

• Explicit recognition of cross-border electronic powers of attorney in acts with legal effects within the EU.

GDPR compliance and data protection

Regulation (EU) 2016/679 (GDPR) applies to any electronic power of attorney involving the processing of personal data. The agent may be required to process data relating to the principal, or even to third parties. In this context:

• A legal basis must be identified (performance of contract, legitimate interest, consent);

• A processing register must mention the processing linked to powers of attorney;

• In the case of a cross-border mandate, the rules on transfers of data outside the EU (articles 44 to 49 of the GDPR) apply if the agent is established in a third country.

Applicable technical standards

Electronic signatures affixed to powers of attorney must comply with the standardised formats of ETSI:

• ETSI EN 319 132 (XAdES) for signatures in XML format;

• ETSI EN 319 122 (CAdES) for signatures in CMS format;

• ETSI EN 319 142 (PAdES) for signatures embedded in a PDF.

Compliance with these standards guarantees interoperability and verifiability of the signature over time, particularly during a tax audit or legal proceedings.

Risks in case of non-compliance

The use of an unqualified tool or a simple scan of a handwritten signature to establish a power of attorney exposes the company to significant risks: nullity of the act, judicial challenge, impossibility of proving the identity of the signatory. For acts of disposition over immovable property or delegations of authority with high stakes, consistent case law from courts of appeal requires an advanced or qualified level of signature.

Use scenarios: electronic power of attorney in practice

Scenario 1 — A law firm managing client representation mandates

A corporate law firm with about fifteen employees processes several dozen powers of attorney each month to represent its clients in contract negotiations or at extraordinary general meetings. Before dematerialisation, each power of attorney required a postal exchange of 3 to 7 working days, with a non-negligible risk of loss or signature error.

By implementing an advanced electronic signature workflow, the firm reduced the average time to obtain a power of attorney to less than 4 hours, with a rate of complete signatures within 24 hours of 91% according to its internal monitoring. The time-stamped audit log also made it possible to quickly resolve a dispute over the validity of a mandate, with the opposing client choosing not to contest an enforceable cryptographic proof.

Estimated gain: 65% reduction in administrative time linked to powers of attorney, roughly equivalent to redirecting 2 full-time employees to higher value-added tasks.

Scenario 2 — An SME with multi-site delegations of authority

An SME of 340 employees, distributed across four production sites, had to formalise several dozen delegations of authority each year (safety, environment, procurement, human resources) for its site managers. The paper approach led to validation delays of 10 to 15 days, multiple versions circulating by e-mail, and uncertainties about which version was in force.

By centralising the management of delegations on a SaaS electronic signature platform, the company implemented a digital register updated in real time, accessible to legal and HR teams. In the event of an inspection by labour inspectorate or environmental authorities, the signed and time-stamped delegation of authority is produced in less than 5 minutes. The average formalisation time fell from 12 days to 36 hours.

Estimated gain: 70% reduction in the time required to put delegations into effect, with the near-elimination of internal disputes over versions in circulation.

Scenario 3 — A property management consortium managing representation mandates

A consortium of managing agents administering a portfolio of several hundred apartment buildings must collect powers of attorney each year from owners to represent them at general meetings. The geographical dispersal of mandants (second homes, expatriates) made the paper approach particularly costly and time-consuming.

By implementing a simple to advanced electronic signature process depending on the stakes of the meeting, the consortium fully dematerialised 100% of its voting powers of attorney. The rate of powers of attorney received before the deadline rose from 58% to 89%, significantly reducing the number of meetings postponed due to lack of quorum. The cost of postage and postal management was reduced by 82% in the first year of use.

Frequently Asked Questions

Is an electronic power of attorney signed abroad valid in France?

Yes, subject to certain conditions. The eIDAS Regulation applies throughout the European Economic Area: a qualified signature issued by a qualified trust service provider (QTSP) of a Member State is recognised in France without any further formality. Outside the EU, validity depends on private international law and applicable bilateral conventions. It is advisable to verify that the signature level used corresponds to the level required by French law for the act in question.

What is the difference between an electronic power of attorney and an electronic notarial deed?

An electronic power of attorney is a dematerialised deed under private seal, signed by the principal alone or together with the agent. An electronic notarial deed, by contrast, is authenticated by a notary who assumes responsibility for it and gives it executive force. Certain acts—such as the sale of immovable property or a donation—require the authentic form to be used as a matter of law, including in electronic form. An ordinary power of attorney, even if qualified within the meaning of eIDAS, cannot replace a notarial deed where the law requires one.

Can the agent sub-delegate the powers granted under an electronic power of attorney?

Sub-delegation is possible only if the power of attorney expressly authorises it or if a legal provision permits it. Without an express clause, the agent must personally perform the task entrusted to them, in accordance with Article 1994 of the Civil Code. In practice, an electronic power of attorney intended to be sub-delegated must state this clearly in its content, otherwise the acts performed by the sub-agent may not be binding on the principal.

How long does an electronic power of attorney remain legally valid?

The period of validity depends on the terms of the power of attorney itself: it may be limited to a specific act, to a specified period, or it may be indefinite and revocable at any time by the principal. From an evidential perspective, the associated evidence—signature certificate, audit log, timestamp—must be retained for as long as the act may be challenged, which is generally ten years for a commercial act and thirty years for certain civil acts.

Does the revocation of an electronic power of attorney take effect immediately?

Revocation is possible at any time by the principal, but it takes effect against third parties only when they have been notified. In electronic format, it is recommended that the revocation be sent by traceable means—registered electronic mail or notification via the signature platform—and that proof of receipt be retained. As long as the agent and third parties have not been informed, acts performed in good faith remain binding on the principal.

Conclusion

The electronic power of attorney for agents represents far more than simply saving time: it is a tool for securing legal representation, provided that the framework imposed by the Civil Code, Regulation eIDAS 2.0 and ETSI standards is strictly respected. In 2026, the acceleration of dematerialisation across all sectors — legal, real estate, industrial, financial — makes it essential for any professional managing mandates to master these mechanisms.

Choosing the right level of signature according to the nature of the act, relying on a qualified trust service provider listed by ANSSI, and archiving proof of signature are the three pillars of an irreproachable electronic power of attorney. Certyneo supports you at every stage, from drafting the mandate to its legal retention. Discover our offerings and request a demonstration on our pricing page to deploy compliant electronic powers of attorney today.