Electronic Signatures in France: INPI Requirements
Filing trademarks, patents, or business documents with France’s Institut National de la Propriété Industrielle (INPI) traditionally required physical presence or mailed paperwork—until electronic signatures became legally recognized. But not just any electronic signature works for INPI submissions. The French intellectual property office has specific requirements that determine whether your digital signature is accepted or rejected.
Understanding INPI’s signature requirements isn’t optional—it’s critical. Submit with the wrong signature level and your trademark application gets delayed or rejected. Use a non-compliant provider and your patent filing lacks legal validity. These mistakes cost time, money, and potentially your intellectual property protection.
This comprehensive guide explains exactly which electronic signatures INPI accepts, when qualified signatures are required versus optional, how French regulations differ from general eIDAS rules, and the step-by-step process to sign INPI documents correctly the first time.
Understanding INPI and French IP Filing Requirements
Before diving into signature requirements, let’s establish what INPI is and why its regulations matter.
What is INPI?
Institut National de la Propriété Industrielle (INPI) is France’s national intellectual property office, responsible for:
- Trademark registration: National French trademarks (marques françaises)
- Patent applications: French patents and European patent filings
- Design protection: Industrial designs and models
- Business registry: Company registrations and modifications (Registre du Commerce et des Sociétés – RCS)
- IP information: Database management and public access to IP records
Why INPI Requirements Matter
INPI operates under both:
- European eIDAS regulation: General framework for electronic signatures across EU
- French national law: Specific implementation through Code de la propriété intellectuelle and other French regulations
This dual framework means France sometimes imposes stricter requirements than the minimum eIDAS standard. What works for a contract in Germany might not satisfy INPI’s French filing requirements.
Critical Distinction: INPI vs. General French Law
While French law generally accepts all three eIDAS signature levels (SES, AES, QES) for commercial contracts, INPI often requires qualified electronic signatures (QES) for specific filings. Don’t assume a signature valid for French business contracts automatically works for INPI submissions.
INPI Signature Requirements by Document Type
INPI’s signature requirements vary depending on what you’re filing. Here’s the complete breakdown.
1Trademark Applications (Dépôt de marque)
Required signature level: Qualified Electronic Signature (QES)
Regulatory basis: Article L. 712-2 of the French Intellectual Property Code requires signatures on trademark applications to have legal equivalence to handwritten signatures.
What this means:
- Simple Electronic Signatures (SES) are NOT accepted
- Advanced Electronic Signatures (AES) are NOT sufficient
- Only Qualified Electronic Signatures (QES) from certified QTSPs are valid
- The signer’s identity must be verified by a regulated trust service provider
Applicable documents:
- Initial trademark application (dépôt initial)
- Trademark renewal applications
- Opposition proceedings documents
- Trademark assignment transfers
2Patent Applications (Dépôt de brevet)
Required signature level: Qualified Electronic Signature (QES)
Regulatory basis: French Patent Code (Code de la propriété industrielle) Article L. 612-2 mandates signatures meeting the highest eIDAS standard for patent filings.
What this means:
- Patent applications require QES from all inventors and assignees
- Priority claims must be signed with QES
- Declarations and statements accompanying patent filings need QES
- Patent transfers and licensing agreements require QES
Special considerations:
- European patent applications filed through INPI also require QES
- PCT (Patent Cooperation Treaty) applications follow European Patent Office rules but INPI accepts QES
- Provisional applications may have relaxed requirements—verify with INPI
3Design Registrations (Dépôt de dessins et modèles)
Required signature level: Advanced Electronic Signature (AES) or QES
Regulatory basis: Article L. 513-1 and related provisions allow either AES or QES for design protection filings.
What this means:
- Advanced Electronic Signatures are sufficient (not just simple signatures)
- QES provides additional legal certainty but isn’t mandatory
- The signature must be uniquely linked to the signatory and capable of identifying them
Recommendation: While AES is accepted, using QES for valuable designs provides stronger legal protection and is worth the modest additional cost.
4Company Registry Filings (RCS)
Required signature level: Qualified Electronic Signature (QES)
Regulatory basis: Decree No. 2019-1118 mandates QES for official company registry submissions managed by INPI.
What this means:
- Business creation filings (création d’entreprise) require QES
- Modifications to company information need QES
- Legal representative appointments must use QES
- Articles of association changes require QES from authorized signatories
Who must sign: Legal representatives, company directors, or authorized agents with proper power of attorney
5Administrative Correspondence
Required signature level: Simple Electronic Signature (SES) or higher
What this means:
- Routine inquiries and non-binding communications accept simple signatures
- Status requests and information updates can use SES
- Official responses and binding declarations should use AES or QES
Best practice: When in doubt, use AES. The marginal cost difference between SES and AES is negligible, and AES provides better legal protection.
Quick Reference Table
| Document Type | Minimum Required | Recommended | Penalty for Wrong Level |
|---|---|---|---|
| Trademark Application | QES (mandatory) | QES | Application rejected |
| Patent Application | QES (mandatory) | QES | Filing invalid |
| Design Registration | AES | QES | SES rejected, AES accepted |
| Company Registry (RCS) | QES (mandatory) | QES | Submission refused |
| Administrative Letters | SES | AES | Usually none |
How to Obtain QES for INPI Filings
Since most INPI filings require qualified electronic signatures, here’s the complete process to obtain and use QES for French IP documents.
Step 1: Choose a Certified Qualified Trust Service Provider (QTSP)
Requirement: INPI only accepts QES from trust service providers listed on the EU Trusted List.
Options for French users:
- French QTSPs: ChamberSign, Certigna, Keynectis, others listed for France on EU Trusted List
- European QTSPs: Any QTSP listed for any EU member state (mandatory cross-border recognition)
- Multi-QTSP platforms: Services like QES-Sign that provide access to multiple certified QTSPs
Do I Need a French QTSP Specifically?
No. Under eIDAS regulation, INPI must accept qualified electronic signatures from any EU-listed QTSP, regardless of country. A QES from a Belgian, German, or Spanish QTSP is legally equivalent to one from a French QTSP. Choose based on convenience, cost, and supported authentication methods—not nationality.
Step 2: Complete Identity Verification
Requirement: To receive a qualified certificate, your identity must be verified according to eIDAS standards.
Verification methods accepted:
- Video identification: Live video call with ID document verification (most common for first-time users)
- In-person verification: Visit authorized registration authority with government-issued ID
- National eID: Use French carte d’identité électronique or other EU eID card
- Existing qualified certificate: If you already have a valid qualified certificate, reuse it
Time required: 5-15 minutes for video identification, 30-60 minutes for in-person
Information needed:
- Government-issued photo ID (passport or national ID card)
- Full legal name (must match ID exactly)
- Email address for certificate delivery
- Phone number for authentication
Step 3: Upload Your INPI Document
Format requirements:
- INPI typically accepts PDF format for signed documents
- Some filings may accept other formats—check INPI portal for specific requirements
- Ensure document is finalized before signing (no editing post-signature)
Document preparation checklist:
- All required fields completed
- Attachments included if applicable
- Correct form version (INPI updates forms periodically)
- Proper formatting and legibility
Step 4: Apply Your Qualified Electronic Signature
Signing process:
- Select your qualified certificate (from verification step)
- Review the document one final time
- Click “Sign” in your QES platform
- Authenticate using your chosen method (PIN, biometric, SMS code)
- Download the signed PDF with embedded QES
What happens technically:
- Platform creates cryptographic hash of your document
- Your private key (stored securely by QTSP) encrypts the hash
- Encrypted signature, your qualified certificate, and timestamp are embedded in PDF
- Document becomes tamper-evident—any modification invalidates signature
Step 5: Submit to INPI
Submission methods:
- INPI online portal: Upload signed PDF through your INPI account
- INPI e-procedures: Use specific e-filing systems for trademarks, patents, etc.
- Professional representatives: Authorized agents can submit on your behalf
Verification by INPI:
- INPI’s system automatically validates the signature against EU Trusted List
- Checks certificate validity at time of signing
- Verifies document integrity (no tampering)
- Confirms signer’s identity matches application requirements
Confirmation: You’ll receive acknowledgment of submission with validation status. If signature is rejected, INPI provides specific error information.
Common INPI Signature Mistakes and How to Avoid Them
Mistake 1: Using Non-Qualified Signatures for Trademark/Patent Filings
The problem: Signing INPI trademark or patent applications with AES or SES instead of QES.
Consequence: Application rejected, filing date lost, potential loss of priority.
Solution: Always verify signature requirement before filing. For trademarks and patents, default to QES unless explicitly told otherwise.
Mistake 2: Signing with Non-EU-Listed QTSP
The problem: Using signature provider not on EU Trusted List (e.g., US-based platforms without European QTSP partnerships).
Consequence: Signature not recognized as qualified, filing invalid.
Solution: Verify your provider is listed at https://eidas.ec.europa.eu/efda/tl-browser/ before purchasing signatures.
Mistake 3: Wrong Signatory Identity
The problem: Employee signs company documents without proper authority, or name on certificate doesn’t match legal representative.
Consequence: Signature lacks legal effect, submission may be rejected.
Solution: Ensure the person signing has legal authority. For company filings, use legal representative’s QES or obtain proper power of attorney.
Mistake 4: Expired Certificate
The problem: Signing with a qualified certificate that expired before signing.
Consequence: Signature invalid, document not accepted.
Solution: Check certificate validity before each signature. Most platforms show expiry date clearly. Renew before expiration.
Mistake 5: Document Modified After Signing
The problem: Making changes to document after applying QES.
Consequence: Signature becomes invalid, document rejected by INPI.
Solution: Finalize document completely before signing. If changes needed, create new version and sign again.
If Your Signature is Rejected
Immediate actions:
- Contact INPI to understand specific reason for rejection
- Determine if you can resubmit with corrected signature
- Check if original filing date can be preserved
- Obtain proper QES certificate if that was the issue
- Resubmit as quickly as possible to minimize delay
Cost Analysis: QES for INPI Filings
Understanding the cost of QES for French IP filings helps you budget appropriately.
Typical Costs
One-Time Trademark Filing
- QES cost: €5-15 per signature
- INPI filing fee: €190-250 (base fee for one class)
- Total signature cost: Negligible compared to filing fees (2-8% of total)
Conclusion: QES adds minimal cost to INPI filings while ensuring legal validity.
Annual Volume Scenarios
| Usage Pattern | INPI Filings/Year | Pay-Per-Use Cost | Subscription Alternative |
|---|---|---|---|
| Small business | 2-5 filings | €10-25 (€5/signature) | €360-600/year wasted |
| Growing company | 10-15 filings | €50-75 | €360-600/year (better value) |
| Active IP portfolio | 25+ filings | €125+ | €600-800/year (similar cost) |
Recommendation: For occasional INPI filings (less than 20 per year), pay-per-use QES provides better value than subscriptions. For high-volume IP work, evaluate both options.
INPI Electronic Filing Resources
Official INPI Platforms
- INPI.fr: Main portal with information and account creation
- e-procedures INPI: Online filing system for trademarks and other IP
- INPI Direct: Account management and filing status
- INPI Help Center: Documentation on electronic signature requirements
Legal References
- Code de la propriété intellectuelle: French IP law with signature requirements
- eIDAS Regulation (EU) No 910/2014: European framework for electronic signatures
- Decree No. 2019-1118: French implementation of eIDAS for government services
Verification Tools
- EU Trusted List Browser: Verify QTSP certification status
- Adobe Acrobat Reader: Validate QES signatures on PDFs
- INPI signature validator: Pre-submission signature check (if available)
Key Takeaways
- INPI requires QES for most critical filings including trademarks, patents, and company registry documents: Don’t assume simple or advanced signatures are sufficient—trademark and patent applications mandate qualified electronic signatures from EU-listed QTSPs or face rejection and lost filing dates.
- Any EU-listed QTSP works for French INPI filings through eIDAS mandatory recognition: You don’t need a French-specific provider—qualified signatures from Belgian, German, Spanish, or any EU member state QTSP are legally equivalent and must be accepted by INPI under cross-border recognition rules.
- Identity verification is one-time investment enabling unlimited future signatures: Complete video identification or in-person verification once (5-15 minutes) to receive a qualified certificate valid for 1-3 years—then create QES instantly for all subsequent INPI filings without repeating verification.
- QES cost is negligible compared to INPI filing fees and rejection risks: At €5-15 per signature versus €190-250+ trademark fees, qualified signatures represent only 2-8% of total cost while eliminating expensive rejection and resubmission scenarios that waste time and potentially priority dates.
- Common mistakes include wrong signature level, expired certificates, and unauthorized signatories: Verify you’re using QES (not AES/SES) from EU-listed provider, check certificate validity before signing, ensure signatory has legal authority for company filings, and never modify documents after signature application.
Sign INPI Documents with Compliant QES
QES-Sign provides qualified electronic signatures that meet INPI requirements at €5 per signature. Access three certified EU-listed QTSPs (itsme, Evrotrust, Adacom) for complete France coverage. Complete identity verification once, then sign all your French IP filings with legally compliant QES—no subscription required.