ValidateFin

BR-21 - Each invoice line needs an identifier

Each invoice line (BG-25) must have an invoice line identifier (BT-126).

BR-21 - Each invoice line needs an identifier

Each invoice line (BG-25) must have an invoice line identifier (BT-126).

Invoice linesEN 16931BT-126 Error

What this rule checks

Each invoice line (BG-25) must have an invoice line identifier (BT-126).

How to fix it

Add a unique ID (BT-126) to every InvoiceLine / CreditNoteLine.

Validate against this rule

This rule is part of EN 16931. Check your invoice with the validator that matches your format:

UBL / PeppolXRechnungFactur-X / ZUGFeRD

Related rules

BR-22Each invoice line needs a quantityBR-23Each invoice line needs a unit of measureBR-24Each invoice line needs a net amountBR-25Each invoice line needs an item nameBR-26Each invoice line needs a net priceBR-27Item net price must not be negative

Source: CEN EN 16931 Schematron · Last verified: 2026-07-10

All validation rules