BR-02 - Invoice number is required
An invoice must have an Invoice number (BT-1) that uniquely identifies the invoice.
BR-02 - Invoice number is required
An invoice must have an Invoice number (BT-1) that uniquely identifies the invoice.
What this rule checks
An invoice must have an Invoice number (BT-1) that uniquely identifies the invoice.
How to fix it
Provide a unique invoice number in the ID element.
Validate against this rule
This rule is part of EN 16931. Check your invoice with the validator that matches your format:
Related rules
Source: CEN EN 16931 Schematron · Last verified: 2026-07-10
All validation rules