UBL-SR-56
EN 16931-1 layer: en16931
Checked against Peppol BIS Billing 3.0 2026.5
What does UBL-SR-56 mean? An Invoice shall contain maximum one Originator document reference identifier (BT-17).
Why did my invoice fail UBL-SR-56?
The Originator document reference (BT-17) identifies the originating tender or lot the invoice relates to, carried as cac:OriginatorDocumentReference/cbc:ID. EN 16931 allows at most one such identifier per invoice, keeping the link back to a single originating procurement document unambiguous.
Official rule text
An Invoice shall contain maximum one Originator document reference identifier (BT-17).
Common causes
- More than one cac:OriginatorDocumentReference element is present.
- Both a tender ID and a lot ID were emitted as separate OriginatorDocumentReference blocks.
- A reference was duplicated when copying procurement metadata.
How do I fix it?
Keep a single reference: <cac:OriginatorDocumentReference><cbc:ID>TENDER-2026-42</cbc:ID></cac:OriginatorDocumentReference>, removing any additional ones.
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
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