Peppol BIS Billing 3.0 · rule

UBL-CR-202

Layer en16931·Checked against Peppol BIS Billing 3.0 2026.5

What does UBL-CR-202 mean? A UBL invoice should not include the AccountingCustomerParty SupplierAssignedAccountID

Why did my invoice fail UBL-CR-202?

This EN 16931 rule warns when the UBL element cac:AccountingCustomerParty/cbc:SupplierAssignedAccountID is present: the invoice should not include a supplier-assigned account ID on the customer party wrapper. The seller's internal number for the buyer is not a wrapper-level field in EN 16931; buyer identifiers belong in cac:Party/cac:PartyIdentification/cbc:ID (BT-46). The element is not forbidden by UBL itself, but it lies outside the EN 16931 core invoice model, so remove it to keep the invoice fully conformant and interoperable.

Official rule text

A UBL invoice should not include the AccountingCustomerParty SupplierAssignedAccountID

Common causes

The seller's customer number mapped to the wrapper element instead of PartyIdentification
Legacy UBL 2.0-style mapping carried forward
Template based on a full UBL 2.1 CustomerParty example

How do I fix it?

<cac:AccountingCustomerParty>
  <cac:Party>
    <cac:PartyIdentification>
      <cbc:ID>CUST-10042</cbc:ID>
    </cac:PartyIdentification>
  </cac:Party>
</cac:AccountingCustomerParty>

Check your invoice against this rule

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