BR-52
EN 16931-1 layer: en16931
Checked against Peppol BIS Billing 3.0 2026.5
What does BR-52 mean? Each Additional supporting document (BG-24) shall contain a Supporting document reference (BT-122).
Why did my invoice fail BR-52?
Each Additional supporting document group (BG-24) must carry a Supporting document reference (BT-122) that identifies the referenced document (e.g. a timesheet, contract, or attachment). Without this identifier the referenced or embedded document cannot be linked back to anything meaningful.
Official rule text
Each Additional supporting document (BG-24) shall contain a Supporting document reference (BT-122).
Common causes
- cac:AdditionalDocumentReference was added (often to carry an embedded attachment) without its cbc:ID.
- An empty cbc:ID element was emitted.
- The reference identifier was placed in DocumentDescription instead of the ID.
How do I fix it?
In cac:AdditionalDocumentReference add <cbc:ID>DOC-2026-001</cbc:ID> identifying the supporting document.
Related rules
BR-01 · BR-02 · BR-03 · BR-04 · BR-05 · BR-06 · BR-07 · BR-08
Check your invoice against this rule
Paste it into the live demo, or call POST /v1/validate. See the quickstart.