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Rules / UBL-CR-100 · Markdown

Peppol BIS Billing 3.0 · rule

UBL-CR-100

Layer en16931·Checked against Peppol BIS Billing 3.0 2026.5

What does UBL-CR-100 mean? A UBL invoice should not include the ContractDocumentReference Xpath

Why did my invoice fail UBL-CR-100?

EN 16931 states that a UBL invoice should not include the cbc:Xpath child of cac:ContractDocumentReference. In the core invoice model this element carries the contract reference (BT-12), for which the core model only uses the document identifier (cac:ContractDocumentReference/cbc:ID), so cbc:Xpath lies outside the standard's subset of UBL and validators flag its presence. It is a warning-level cardinality rule: the extra data is ignored by receivers that implement only the core model.

Official rule text

A UBL invoice should not include the ContractDocumentReference Xpath

Common causes

Related rules

UBL-CR-001 · UBL-CR-002 · UBL-CR-003 · UBL-CR-004 · UBL-CR-005 · UBL-CR-006 · UBL-CR-007 · UBL-CR-008

Check your invoice against this rule

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