UBL-SR-45
EN 16931-1 layer: en16931
Checked against Peppol BIS Billing 3.0 2026.5
What does UBL-SR-45 mean? Due Date shall occur maximum once
Why did my invoice fail UBL-SR-45?
The Payment due date (BT-9) states when the invoice amount is due for payment. In UBL it is carried as cac:PaymentMeans/cbc:PaymentDueDate, and EN 16931 permits at most one due date per invoice. Multiple due dates would make the single amount due to be paid (BT-115) ambiguous.
Official rule text
Due Date shall occur maximum once
Common causes
- cbc:PaymentDueDate is present in more than one cac:PaymentMeans element.
- A duplicated PaymentMeans block was created for alternative payment methods, each repeating the due date.
- Installment logic incorrectly emitted several PaymentDueDate values in one invoice.
How do I fix it?
Keep the due date in a single place: <cbc:PaymentDueDate>2026-08-01</cbc:PaymentDueDate> in one cac:PaymentMeans, and remove it from any others.
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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