# BH-FR-03 — Buyer SIREN missing (France, from 09/2026)

> https://billhorse.com/en/rules/bh-fr-03/

## What does this error mean?

From 2026-09-01 the buyer's SIREN (BT-47) is mandatory on French B2B invoices — it drives routing via the certified platforms (PDP).

## How to fix it

Capture the customer's SIREN (publicly searchable in the SIRENE register) and emit it as the buyer's legal organization ID.