Electronic Signature for SARL Bylaws in 2026

Introduction: digitizing SARL creation, a consolidated legal reality

Since the PACTE law of 2019 and Ordinance No. 2021-1192 of September 15, 2021 reforming the law of securities and confirming the probative value of documents under electronic private signature, electronic signature of SARL bylaws is legally valid in France. In 2026, the majority of commercial court registries accept completely dematerialized creation files via the INPI single window, which has been open since January 2023. For entrepreneurs, partners and chartered accountants, understanding when and how to use electronic signature during company incorporation has become an essential skill. This article details the applicable framework, required signature levels, pitfalls to avoid and best practices for smooth and compliant business creation.

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Why electronic signature is becoming essential in SARL creation

A favorable regulatory context since 2021

Ordinance No. 2021-1192 amended article 1367 of the Civil Code to strengthen recognition of electronic signature in legal documents, including company formation documents. In parallel, Decree No. 2021-1572 of December 2, 2021 clarified the implementation methods for documents under electronic private signature filed with the registry. Concrete result: a SARL formation document electronically signed by all founding partners has the same probative force as a paper original, provided that the solution used complies with the eIDAS regulation and its technical requirements.

In practice, the INPI single window has allowed since 2023 to file the entire creation application online, attaching the bylaws in electronically signed PDF format. Registries process these files within the same timeframes as paper files — or even faster, since OCR and automated checking reduce rejections for formal errors.

Concrete benefits for founders and their advisors

Sector studies published by CPME and the National Federation of Chartered Accountants estimate that dematerializing the creation process reduces by 40 to 60% the administrative time spent collecting and sending documents. For an accounting firm managing several dozen creations per year, this represents several hundred hours saved. For an individual entrepreneur creating their first SARL, eliminating mail exchanges or physical meetings with co-partners is a decisive advantage, especially when they are geographically dispersed.

The Certyneo ROI calculator allows you to precisely estimate the savings achievable based on your annual document volume.

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Which level of electronic signature for SARL bylaws?

The three eIDAS levels and their applicability

Regulation eIDAS No. 910/2014, directly applicable in French law, distinguishes three levels of electronic signature:

• Simple Electronic Signature (SES): basic identification of the author, limited probative value.
• Advanced Electronic Signature (AES): linked uniquely to the signatory, enabling their identification, created from data under their exclusive control, and detecting any subsequent modification of the document.
• Qualified Electronic Signature (QES): the highest level, equivalent to a handwritten signature under European law, issued by a Qualified Trust Service Provider (QTSP) registered on the national trust list.

For SARL bylaws under private deed — the most common form — Advanced Electronic Signature (AES) is generally sufficient and constitutes the standard recommended by legal practitioners. It offers a level of security adapted to formation documents while remaining accessible and smooth for signatories.

Special case: SARLs with real estate contributions or notarial deeds

When contributions in kind include real property, the bylaws must be executed by notarial deed (article L.223-9 of the Commercial Code). In this case, the notary uses their own qualified electronic signature in accordance with the rules of the notarial chamber. The "SaaS" electronic signature of the partners does not replace the mandatory notarial intervention.

Similarly, if the SARL is subject to specific formalities (e.g., a regulated sector requiring prior approval), it is advisable to check with a specialized legal firm whether particular formal requirements apply.

Time stamping and archiving: underappreciated obligations

Beyond the signature itself, the legal value of an electronic document also rests on qualified time stamping (ETSI EN 319 422 standard) and the ability to produce a complete audit trail in case of dispute. A professional electronic signature solution must generate a tamper-proof audit log mentioning the signatory's identity, time and date of signature, IP address and the document's cryptographic hash. These elements are essential to enforce the signature against third parties — including the registry or the tax administration.

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Practical process: signing your SARL bylaws online step by step

Step 1 — Document preparation

SARL bylaws must necessarily mention, according to article L.223-7 of the Commercial Code: the corporate form, corporate purpose, company name, registered office, share capital, each partner's contributions, distribution of partnership units and company duration. It is recommended to work from templates that comply with current regulations. Certyneo's AI-powered contract generator offers updated bylaw templates pre-formatted for filing with the INPI single window.

Once the document is finalized and converted to PDF/A (long-term archiving format recommended by ISO 19005 standard), it is ready to be sent for signing.

Step 2 — Identification of signatories and dispatch

Each founding partner must be invited to sign via the electronic signature platform. For AES compliant with eIDAS, signatory identification is generally performed through:

• An OTP code (one-time password) sent by SMS to the phone number previously verified;
• Documentary identity verification (scan of ID card or passport) for larger amounts or stakes.

The platform then generates a secure signature link transmitted to each partner. They can sign from any device (computer, tablet, smartphone) without software installation.

Step 3 — Retrieval and filing with the registry

Once all partners have signed, the platform produces an electronically signed PDF document, accompanied by its signature certificate and audit trail. This document can be filed directly on the guichet-entreprises.fr portal or formalites.entreprises.gouv.fr (INPI). The registry verifies the validity of the electronic signature via ETSI standards and validates the registration.

For teams processing many corporate creations, integrating electronic signature into an automated workflow — via API — allows triggering the signature dispatch as soon as bylaws are validated in the business software. This approach is detailed in our comprehensive guide on electronic signature in business.

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Common mistakes to avoid when electronically signing bylaws

Using a non-compliant eIDAS solution

Not all electronic signature solutions are equal. A simple name entry field or a paraph image inserted into a PDF does not constitute an electronic signature in the legal sense. To be enforceable, the signature must be produced by a registered trust service provider (TSP) or compliant with European standards. In case of dispute, a non-compliant signature will be rejected by the judge, which could result in the nullity of the document.

It is therefore essential to choose a certified solution, such as those compared in our electronic signature solution comparison.

Failing to preserve audit evidence

The audit trail generated when signing must be preserved for the entire life of the company, and for a minimum of the five-year prescription period applicable to civil documents (article 2224 of the Civil Code). Certyneo automatically archives signed documents and their evidence for 10 years, in compliance with GDPR requirements and CNIL recommendations.

Confusing SARL and EIRL in terms of formalities

Although EIRL (Limited Liability Individual Entrepreneur) was abolished for new creations since the law of February 14, 2022 — replaced by the single status of individual entrepreneur — some practitioners still manage existing EIRLs. The formalities for modification or closure of an EIRL do not follow the same rules as those for a SARL. For these situations, consult the electronic signature glossary and, if necessary, specialized legal counsel.

Legal framework applicable to electronic signature of company bylaws

Foundational European texts

The Regulation (EU) No. 910/2014 of the European Parliament and of the Council of July 23, 2014, known as eIDAS regulation, constitutes the regulatory foundation of electronic signature in Europe. It establishes the three levels of signature (simple, advanced, qualified), defines qualified trust service providers (QTSP) and creates national trust lists supervised by supervisory authorities — ANSSI in France. eIDAS Regulation 2.0, progressively being deployed since 2024, strengthens interoperability requirements and introduces the European digital identity wallet (EUDI Wallet).

GDPR No. 2016/679 applies to the processing of personal data of signatories (name, email address, phone number, possible biometric data). Electronic signature providers must be able to produce a record of processing activities, appoint a DPO if necessary, and guarantee individual rights (access, rectification, erasure).

National law

Article 1366 of the Civil Code establishes the principle of equivalence between electronic writing and paper writing: "Electronic writing has the same probative force as writing on paper medium, provided that the person from whom it emanates can be duly identified and that it is established and preserved under conditions guaranteeing its integrity."

Article 1367 of the Civil Code defines electronic signature as "the use of a reliable identification process guaranteeing its link with the document to which it is attached" and creates a presumption of reliability for qualified signatures.

Ordinance No. 2021-1192 of September 15, 2021 strengthened consistency between Civil Code provisions and eIDAS regulation, particularly on the concept of electronic authentic deed and document under electronic private signature.

Decree No. 2017-1416 of September 28, 2017 clarifies the conditions of reliability of the electronic signature process for documents under private signature, notably requiring the use of certificates compliant with standards ETSI EN 319 132 (XAdES) or ETSI EN 319 122 (CAdES) or ETSI EN 319 142 (PAdES).

Practical obligations and risks

A non-compliant electronic signature exposes founders to the risk of nullity of the formation document, which could result in the registry refusing registration or, subsequently, challenge by a partner or creditor. In tax matters, the administration may also question the verified date of a document whose signature is not validly established. It is therefore imperative to choose a provider whose eIDAS compliance is documented and audited, and to preserve all audit evidence for at least the applicable prescription period.

Use scenarios: electronic signature of SARL bylaws in practice

Scenario 1 — An accounting firm managing batch creations

An accounting firm with about ten employees accompanies on average 80 to 120 corporate creations per year, with a majority of SARLs. Before dematerialization, each file required printing, handwritten signature and digitization of bylaws, then postal dispatch or physical delivery to each partner. The average time between finalizing the bylaws and receiving documents signed by all partners reached 7 to 12 business days.

Since integrating an advanced electronic signature solution connected to their management software, this timeframe has dropped to under 48 hours in over 85% of files. Partners sign from their smartphone, regardless of their place of residence. The audit trail is automatically archived in the client file. The firm estimates savings of 3 to 4 hours of administrative work per file, representing total annual savings of 240 to 480 hours reallocated to higher-value advisory work.

Scenario 2 — Founding partners geographically dispersed

Three entrepreneurs wish to establish a SARL to develop a consulting activity. One lives in the Paris region, the second in Bordeaux, the third works from Lisbon as a digital nomad. Without electronic signature, coordinating for signature of the bylaws would have required either a joint meeting or successive registered mail exchanges with unavoidable delays of 10 to 15 days.

Thanks to an advanced electronic signature platform, the three partners simultaneously receive a signature link by email. Each identifies themselves via SMS OTP, reviews and signs the document in under 5 minutes. The total time for collecting all three signatures is under 2 hours. The complete file is filed on the INPI single window the same day, and registration occurs within the next 5 business days.

Scenario 3 — A business creation support structure

A public business creation support structure (incubator or accelerator) accompanies between 50 and 80 project leaders each year in incorporating their first company. It offers an all-in-one service including bylaws drafting via a customizable generator and collection of electronic signatures from founding partners.

Integrating an electronic signature API into its support platform automatically triggers the signature workflow upon validation of bylaws by an advisor. The rate of registry rejections for formal reasons (missing signatures, illegible documents) decreased from 18% to under 3% after fully dematerializing the creation process. The average duration of creation support was reduced from 22 to 14 days, significantly improving satisfaction among accompanied entrepreneurs.

Conclusion

Electronic signature of SARL bylaws is today a legally sound practice, technically accessible and economically advantageous. The European regulatory framework (eIDAS) and national framework (Civil Code, Ordinance 2021-1192) provide robust legal security as long as the solution used complies with Advanced Electronic Signature standards. Time savings — measured at 40-60% of the overall administrative process — and elimination of geographic constraints make dematerialization a major lever for founders, chartered accountants and legal advisors.

The essentials to remember: choose an eIDAS-compliant provider, use the right signature level (AES as a rule), preserve audit evidence and account for the specific requirements of SARLs with notarial contributions.

Certyneo supports you at every step, from bylaw generation to signature and archiving. Create your free account and simplify your SARL creations starting today.