Sign your INPI summary
with a qualified electronic signature.

Upload the summary PDF generated by your French Guichet Unique INPI formality: an eIDAS qualified electronic signature is applied in 2 minutes. You receive your signed summary by email, ready to be re-uploaded on the INPI portal. An effective alternative when FranceConnect+ doesn't work.

🔒 Secure payment 💳 One-time fee 📞 Support 7 days/week
eIDAS logo — EU regulation 910/2014 qualified signature
eIDAS Compliant
100% INPI acceptance rate
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INPI
Acceptance rate: 100%
eIDAS compliant · EU 910/2014
★★★★★ 4.9/5 on Trustpilot · verified reviews
Drop your INPI PDF here
or tap to browse · PDF · max 20 MB
 Sign my INPI document →
eIDAS qualified signature · delivered by email in 2 min
100% accepted by the INPI portal — guaranteed
No software · expert support 7 days/week
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Need help? +33 1 82 28 02 30 — 7 days/week, 9am-7pm CET

Summary

SignerSynthèse.fr applies an eIDAS qualified electronic signature to PDF summaries from the French INPI Guichet Unique — a full alternative to FranceConnect+ when it fails (foreign ID, Identité Numérique La Poste rejected, blank page, etc.).

  • Price: €29 ex. VAT per signature (€34.80 incl. VAT). June 2026 launch promo: €19 ex. VAT (€22.80 incl. VAT) until 2026-06-30.
  • Time: 2 to 5 minutes from upload to receiving the signed summary by email.
  • Qualified Trust Service Provider: Cryptolog International (Universign, Signaturit Group), listed on the EU Trust List.
  • Identity verification: ANSSI-certified PVID journey (EU/EEA ID card, passport, residence permit). No FranceConnect+ or Identité Numérique La Poste required.
  • Eligible formalities: articles amendment, business cessation, annual accounts filing, trademark filing, patent filing, company formation (complex cases).
  • Hosting: Amsterdam (Netherlands, EU), GDPR compliant. Edited by Securit Expert SAS (Paris). Support +33 1 82 28 02 30.
The problem

Why thousands of entrepreneurs
are blocked on the INPI

The French INPI portal requires an eIDAS qualified electronic signature — the highest level. A blockage almost always discovered at the very last step.

INPI summary rejected

You signed your summary, but the Guichet Unique rejects it. A non-qualified advanced signature is not accepted — you need an eIDAS qualified signature.

FranceConnect+ doesn't work

Blank page, orange banner, reload loop… FranceConnect+ regularly fails on the INPI, especially during peak hours. Our solution bypasses FranceConnect+ entirely.

Imminent INPI deadline

Your formality has a legal deadline. Every day spent figuring out how to sign costs you time, stress, and potentially penalties.

How it works

From upload to qualified signature
— all on a single platform

Everything is done online, no installation. Signed document delivered by email in 2 minutes.

1

Upload your PDF

Upload your documents securely with our enterprise-grade encryption.

🔒 SSL 256-bit
2

Sign your document

Verify your identity with SMS. eIDAS qualified signature applied automatically.

✓ eIDAS certified
3

Secure download

Receive your signed document by email within minutes. Ready to upload on the INPI portal.

📧 Email delivery
Our certifications

Official recognition and full compliance

INPI France logo — Guichet Unique

INPI Portal

Guichet Unique

European Union

Regulation 910/2014

eIDAS logo — EU regulation 910/2014

eIDAS Standard

Qualified signature

SSL 256-bit

Encrypted connection

Sign your INPI summary on smartphone — eIDAS qualified signature for the Guichet Unique
Acceptance rate: 100%
eIDAS compliant · EU 910/2014
Our expertise

Qualified electronic signature,
compliant and recognised

We work with Trust Service Providers compliant with the European eIDAS regulation. Your signature is legally valid for all your INPI procedures.

Compliant with EU eIDAS Regulation
The highest signature level recognised in Europe.
Instantly accepted by the INPI portal
100% acceptance rate on the Guichet Unique.
Simple SMS-based identity verification
No USB key, no card reader. Just your phone.
No software to install
You receive your signed document directly by email.
Valid for trademark, patent and other filings
All Guichet Unique INPI procedures covered.
Use cases

For which INPI formality?

All Guichet Unique formalities are supported. Click yours.

2 min
Formation
Company formation
Constitution of a French company (SAS, SARL, SCI) on the Guichet Unique.
Sign
★ Most popular
Self-employed
Micro-enterprise
Creation, modification or deregistration of your French micro-enterprise.
Sign
2 min
Cessation
Business cessation
Permanent closure of your company with deregistration from the RCS.
Sign
2 min
Amendment
Articles amendment
Change of director, registered office, share capital or company name.
Sign
Yearly
Annual accounts
Annual accounts filing
Balance sheet, income statement and notes filed via the Guichet Unique.
Sign
2 min
Trademark
Trademark filing
File a French trademark with the INPI via the Guichet Unique.
Sign
★
Trustpilot

What our customers say

All reviews below are authentic and verifiable on Trustpilot.

Read all reviews on Trustpilot →
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Christelle Fazio
FR · 1 review

Thank you, I had tried several methods…

I found your site looking for how to sign a formality with a qualified certificate without having to travel. It worked immediately. Phew! Thanks 😊

2 days ago Verified
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Yvan Letalleur
FR · 1 review

Simple, fast, effective

Simple, fast, inexpensive and signature accepted without difficulty by the INPI. No bad surprises with this site.

5 days ago Verified
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Alicia
FR · 1 review

15 minutes to unblock

2 days trying to validate my INPI document. In 15 minutes it was done. I recommend without hesitation.

13 days ago Verified
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Brigitte F
FR · 1 review

A Sunday in 15 minutes flat

I did this work on a Sunday whereas I had spent 2 weeks on the INPI website. Such transparency, real security.

6 days ago Verified
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Pierre D.
FR · 9 reviews

INPI accepted it instantly

I received my signed document by email. And the INPI accepted it instantly. Thaaaanks 😊

15 days ago Verified
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Reflex Nature
FR · 2 reviews

Trusted website

Reassuring phone contact. The agent assisted me live. Document validated by the INPI.

14 days ago Verified
Frequently asked questions

Everything you need to know

Answers to the most-searched questions about signing the INPI summary.

How do I sign the INPI summary on the Guichet Unique?
The Guichet Unique (INPI) generates a PDF summary at the end of each formality. For amendment, cessation or annual accounts filings, this document must be signed with an eIDAS qualified electronic signature. With SignerSynthèse.fr, you upload your summary, fill in your details, pay, and receive the signed summary by email in 2 minutes — ready to be re-uploaded on the Guichet Unique.
Why was my INPI summary rejected?
The Guichet Unique automatically checks the signature level on your PDF summary. A simple signature (Adobe Reader, scan) or a non-qualified advanced signature is rejected immediately. Only an eIDAS qualified electronic signature, issued by a provider listed on the European Trust List (EU Trust List), is accepted for amendments, cessations, and annual accounts.
FranceConnect+ doesn't work for signing my INPI summary, what should I do?
FranceConnect+ regularly fails on the INPI: blank page after authentication, orange banner with no message, reload loop. Failures are particularly frequent between 9am and noon. Our service is a complete alternative to FranceConnect+: we apply an eIDAS qualified signature on your INPI summary without going through FranceConnect, in 2 minutes, 7 days a week.
What is the difference between an advanced and a qualified signature for the INPI?
The advanced signature guarantees the signer's identity and document integrity, but without a certificate issued by a qualified provider. The eIDAS qualified signature adds a certificate issued by a provider recognised on the European Trust List (EU Trust List) — it's the highest legal level, and the only one accepted by the INPI for amendment, cessation, and annual accounts filings.
How long does it take to sign the INPI summary?
The complete journey (uploading the PDF summary, form, payment, photo and SMS-based identity verification, signature) takes on average 2 to 5 minutes. The signed summary is sent to you by email immediately afterwards — all you need to do is re-upload it on the Guichet Unique.
Which INPI formalities require a qualified signature on the summary?
All formalities filed via the INPI Guichet Unique on the PDF summary: amendment of articles of association (change of director, registered office, share capital, company name), business cessation, annual accounts filing, trademark filing, patent filing, as well as company formations with in-kind contributions, complex bylaws, or in case of FranceConnect+ failure.
What is the price to sign an INPI summary?
The price is displayed at payment, after uploading your document. One-time payment, no subscription, no hidden fees. The expert callback remains free and without commitment.
Are you listed on the EU Trust List?
Yes. Our Qualified Trust Service Provider is Cryptolog International (Universign, by Signaturit Group), listed on the EU Trust List — the European Trust List maintained by the European Commission and ANSSI. This guarantees that your qualified signature will be accepted by the INPI Guichet Unique 100% of the time.
What ID do I need to sign?
Three types of valid documents are accepted: national identity card (EU/EEA), passport (EU, EEA and most third countries — UK, Switzerland, USA, Canada, Australia, Japan…), or residence permit in valid currency for non-EU nationals residing in Europe. The document must be presented front and back, legible, with a photograph allowing identification. Driving licences and family record books are not accepted. Verification carried out by our Universign provider via its ANSSI-certified PVID journey. Full details in our Terms — Article 7.

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