Peppol BIS Billing 3.0 · rule

UBL-CR-455

Q: How do I fix UBL-CR-455?

Payment within 30 days; 2% discount if paid within 10 days

Layer en16931·Checked against Peppol BIS Billing 3.0 2026.5

What does UBL-CR-455 mean? A UBL invoice should not include the PaymentTerms ReferenceEventCode

Why did my invoice fail UBL-CR-455?

EN 16931 defines a fixed semantic model, and any UBL element outside that model must not be used. This rule flags the cac:PaymentTerms/cbc:ReferenceEventCode element, which has no corresponding business term in EN 16931, so a compliant invoice should not include it. Within cac:PaymentTerms, EN 16931 supports only a textual description of the payment terms (cbc:Note, BT-20); all structured payment-terms sub-elements are outside the model.

Official rule text

A UBL invoice should not include the PaymentTerms ReferenceEventCode

Common causes

Structured payment-terms data (discounts, penalties, installments) mapped into UBL fields instead of expressed as text in cbc:Note (BT-20)
A mapping template copies every source field into UBL without filtering to the EN 16931 element list
Reusing an invoice template from a non-EN 16931 UBL profile that populated this element

How do I fix it?

<cac:PaymentTerms>
  <cbc:Note>Payment within 30 days; 2% discount if paid within 10 days</cbc:Note>
</cac:PaymentTerms>

Check your invoice against this rule

Paste it into the live demo, or call POST /v1/validate. See the quickstart.