BR-02: Invoice number (BT-1) is missing
Severity: fatal ยท Syntax: CII, UBL
Official message
An Invoice shall have an Invoice number (BT-1).
What this means
BT-1, the invoice number, must be non-empty after normalize-space. UBL: the invoice cbc:ID. CII: ram:ID in ExchangedDocument.
Typical cause
The software's number series did not write the field.
How to fix it
Set a unique number. The rule does not check whether the number was used before.
UBL
<cbc:ID>R2026-001</cbc:ID>CII
<ram:ID>R2026-001</ram:ID>Business term
BT-1
Related rules
Context and assertion
UBL /ubl:Invoice | /cn:CreditNote
CII /rsm:CrossIndustryInvoice
UBL
normalize-space(cbc:ID) != ''CII
normalize-space(rsm:ExchangedDocument/ram:ID) != ''Check a file now, free of charge
curl -F "file=@rechnung.xml" https://checkxrechnung.com/v1/validate
Questions
What does BR-02 actually check?
BT-1, the invoice number, must be non-empty after normalize-space. UBL: the invoice cbc:ID. CII: ram:ID in ExchangedDocument.
How do I fix BR-02?
Set a unique number. The rule does not check whether the number was used before.
If BR-02 passes, is the invoice legally compliant?
No. This page helps you read this one Schematron assertion. A pass is not a statement about tax law, portal acceptance, or bank overlays.