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Fatal

BR-FR-09_BT-29: Seller SIRET must have 14 digits and start with the SIREN

In short

Fatal: fails the selected checks.

BR-FR-09_BT-29 means the seller's SIRET does not have 14 digits, or its first nine digits are not the seller's SIREN. Fix it by entering the correct 14-digit SIRET for the seller, which always begins with the SIREN.

On this page

What it means

When the seller gives a SIRET (as a seller identifier, BT-29, identification scheme 0009), the rule checks that it has 14 digits and starts with the seller's SIREN (BT-30). A SIRET is the nine-digit SIREN of the company followed by a five-digit number for the establishment. The rule is skipped if no SIRET is given, and the error message shows the SIRET and the SIREN it compared.

Why it matters

French platforms and the tax authority identify the seller by its SIREN and SIRET. A SIRET that does not belong to the SIREN points to two different companies, so the seller cannot be identified and the invoice is rejected.

How to fix it

Check the seller's SIRET and SIREN against the Annuaire des Entreprises, the public company register, and correct whichever one is wrong in your company settings. Enter the SIRET as 14 digits and nothing else. Typical causes are a SIRET copied from another company or establishment, a missing digit, or a leading zero lost in a spreadsheet.

The rule as published

Le SIRET doit contenir 14 chiffres et commencer par le SIREN. SIRET : " … ", SIREN : " … ".

Where this rule applies

Rule set Version
France CTC (UBL invoice) 1.4.0-04
France CTC (UBL credit note) 1.4.0-04
France CTC (CII) 1.4.0-04
Rule text from phive-rules 4.6.4.

Check your file

Drop your e-invoice to see whether BR-FR-09_BT-29 still fails, and which other rules do.

Updated 6 November 2026