1
Open your filing on the INPI Guichet unique.
2
Go as far as the signature step.
3
Download the summary document as a PDF. Keep your document on your device.
How do I sign my INPI document online?
Your summary document signed in minutes, from home.
Stuck at the “Signature” step of the Guichet unique (the INPI online portal)? Upload your summary document, draw your signature and confirm with the code sent by email. Your signed document lands in your inbox, ready to upload.
Advanced eIDAS signature
A certificate issued by a provider on the EU Trusted List.
No subscription
A one‑off payment, with the exact price shown before you pay.
Help 7 days a week
A team replies if your filing gets stuck.
Your document signed in 3 steps
No account or software needed. All you need is your summary document and an email address.
1
Upload your document
Download the summary document from the Guichet unique, then upload it as a PDF.
2
Draw your signature
Draw your signature with your mouse, then confirm with the code sent by email.
3
Receive your signed document
Your signed document arrives by email within minutes, ready to upload.
1
Open the site on your phone
No app to install: your browser is all you need.
2
Sign with your finger
Draw your signature directly on the screen, then confirm with the code sent by email.
3
Receive your document by email
Open the signed document, then upload your document to the Guichet unique.
The guide
The step-by-step guide, from the Guichet unique to the final upload
Follow these steps in order. Each one takes less than a minute.
Get your summary document
Upload your document to ClairSign
1
Click “Sign my document”.
2
Choose the PDF of the summary document.
3
Check the file name shown, then continue.
Sign and confirm your document
1
Enter your first name, last name and email address.
2
Draw your signature with your finger or mouse.
3
Enter the 6-digit code received by email.
Receive your signed document
1
Open the email “Your signed document”.
2
Download the attached PDF.
3
No email? Check your spam folder.
Complete your filing
1
Go back to the signature step of your filing.
2
Upload the signed document you received by email.
3
Confirm your filing: you’re done.
Sign for your situation
Choose your situation: each guide explains the process in detail.
By filing
Starting a business with the INPI: electronic signature explained
SAS, SARL, SCI, micro: formation is normally signed by ticking a box. If the portal asks for an electronic signature, here’s what to do.
INPI articles amendment: the signature that unblocks everything
Articles amendment stuck at the signature step on INPI? The Guichet unique requires an advanced signature. Here’s how to sign your filing.
INPI business closure: which documents to sign in 2026?
Business closure stuck at the signature step on the INPI portal? The documents to sign, the signature required and the solution in minutes.
INPI annual accounts filing: the electronic signature explained
Signing the annual accounts filing on the INPI Guichet unique: the signature required, the procedure and the solution if FranceConnect gets stuck.
INPI registered office transfer: signature and procedure
Registered office transfer via the INPI Guichet unique: procedure, documents, costs and the advanced electronic signature required at filing.
INPI share transfer: procedure and signature
Declaring a share transfer on the INPI Guichet unique: procedure, documents, the electronic signature required and what to do if you are blocked.
By type of business
INPI electronic signature for a micro-entreprise: 2026 guide
Micro-entrepreneur: formation is signed by ticking a box; changes and closure require an advanced electronic signature. Solutions.
Signing on INPI as an SAS: the president’s guide
SAS president: who signs your INPI filings, which electronic signature the Guichet unique requires, and how to get past a rejection.
Signing on INPI as an SARL: the manager’s complete guide
SARL manager: who signs your INPI filings, which electronic signature the Guichet unique requires, and how to get past a rejection.
Signing on INPI as an SCI: the manager’s guide
SCI manager: who signs your INPI filings, which electronic signature the Guichet unique requires, and how to get past a rejection.
INPI change of manager: signature and procedure
Change of manager on the INPI Guichet unique: procedure, documents, costs and the advanced electronic signature required at filing.
INPI power of attorney: who should sign the document?
INPI power of attorney: who signs the power of attorney, who signs the summary document, and which electronic signature does the Guichet unique require?
By problem
FranceConnect not working on INPI? Here are the solutions
Blank page, identity error, login loop on FranceConnect for INPI? The solutions, and how to sign without FranceConnect in minutes.
“Your signature is not valid” on INPI: the real causes and the fix
Signature not valid on INPI? Company seal, unrecognised authority, re-saved PDF: the portal’s exact messages and how to fix them.
Signing on INPI without FranceConnect: the complete solution
FranceConnect not working, or you’d rather not use it? How to sign on the INPI portal without FranceConnect, in minutes.
Signing your INPI filing from abroad: the 2026 guide
Expat or non-resident director: FranceConnect+ often fails outside France. How to sign an INPI document from abroad, with a code by email.
Urgent INPI signature: unblock your filing in minutes
INPI deadline coming up? Advanced electronic signature (eIDAS) in minutes, with no account to create. Built for the INPI Guichet unique.
Digital identity problems on INPI: diagnosis and solutions
La Poste digital identity rejected, France Identité crashing, FranceConnect+ stuck in a loop? Here’s how to sign on INPI without a digital identity.
Frequently asked questions
Which document should I upload?
The summary document (document de synthèse) for your filing, in PDF format. You download it from the INPI Guichet unique, at the signature step.
How long does it take?
A few minutes, start to finish. You upload your document, sign and confirm with the code received by email.
Will my signed document be accepted by INPI?
Your document receives an advanced electronic signature (eIDAS). It is backed by a trust service provider listed on the European Union Trusted List. The signed document is then filed on the Guichet unique, at the “Signature” step of your formality.
Do I need a video appointment or a special device?
No. A computer or phone and an email address are all you need.
How do I then upload my signed document?
Go back to the signature step of your filing on the Guichet unique, then upload the signed document you received by email.
What if my filing is blocked or rejected?
Write to us with a screenshot of the message shown: our team looks at your file and helps you 7 days a week.
Are my documents protected?
Yes. Your documents are sent encrypted and used only for your signature.
I haven’t received my signed document. What should I do?
First check your spam folder. If the document isn’t there, email us with the email address you used: we’ll send it again.
How much does it cost to sign my document?
The price starts at €19.90 incl. VAT. The exact price for your formality is shown before any payment.
Is there a subscription?
No. You pay once, for one document. No further charges follow.
Who collects the payment?
A licensed payment provider collects the payment and sends you the receipt. On your statement, the line shows “CLAIRSIGN”.
Sign your document now.
Upload your summary document, sign and receive your signed document by email. It’s simple, secure and built for the Guichet unique.
Advanced electronic signature (eIDAS) for your filings on the INPI Guichet unique.
Need help?
Write to us
Our team replies 7 days a week, by email.
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Exact amount shown before you pay, with no hidden fees.