UBL-SR-33
EN 16931-1 layer: en16931
Checked against Peppol BIS Billing 3.0 2026.5
What does UBL-SR-33 mean? Supporting document description shall occur maximum once
Why did my invoice fail UBL-SR-33?
An Additional supporting document (BG-24) may carry one Supporting document description (BT-123) giving a human-readable explanation of the attached or referenced document. EN 16931 permits at most one description per supporting document, so cbc:DocumentDescription must not repeat inside a single cac:AdditionalDocumentReference.
Official rule text
Supporting document description shall occur maximum once
Common causes
- Two cbc:DocumentDescription elements in one cac:AdditionalDocumentReference.
- Description duplicated per language within the same reference.
- A template adds a second description line instead of appending to the first.
How do I fix it?
Keep one description per reference: <cac:AdditionalDocumentReference><cbc:ID>DOC-1</cbc:ID><cbc:DocumentDescription>Timesheet March 2026</cbc:DocumentDescription></cac:AdditionalDocumentReference>.
Related rules
UBL-SR-01 · UBL-SR-02 · UBL-SR-03 · UBL-SR-04 · UBL-SR-05 · UBL-SR-06 · UBL-SR-07 · UBL-SR-08
Check your invoice against this rule
Paste it into the live demo, or call POST /v1/validate. See the quickstart.