UBL-SR-35
EN 16931-1 layer: en16931
Checked against Peppol BIS Billing 3.0 2026.5
What does UBL-SR-35 mean? Referenced purchase order line identifier shall occur maximum once
Why did my invoice fail UBL-SR-35?
An invoice line may reference the Referenced purchase order line identifier (BT-132), linking the line to a specific line of the buyer's order. EN 16931 allows at most one such reference per invoice line, so cac:OrderLineReference/cbc:LineID must not repeat within a single cac:InvoiceLine.
Official rule text
Referenced purchase order line identifier shall occur maximum once
Common causes
- Two cac:OrderLineReference blocks on one invoice line.
- cbc:LineID repeated inside a single cac:OrderLineReference.
- A line that fulfils several order lines is modelled with multiple order-line references instead of separate invoice lines.
How do I fix it?
Keep one order-line reference per invoice line: <cac:OrderLineReference><cbc:LineID>5</cbc:LineID></cac:OrderLineReference>; split fulfilment across separate invoice lines if needed.
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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