BR-DE-26

A corrected invoice (BT-3 with code 384) should reference the invoice it corrects at least once (group BG-3, "PRECEDING INVOICE REFERENCE") — otherwise the recipient cannot tell what is being corrected.

Severity: Warning
Applies to: CII, UBL
Rule set: v2026-01-31

Official rule text

Wenn im Element Invoice type code (BT-3) der Code 384 (Corrected invoice) übergeben wird, soll PRECEDING INVOICE REFERENCE BG-3 mind. einmal vorhanden sein.

Why it happens

The correction is generated as a standalone document, and the original invoice number appears only in free text ("correction to invoice 2026-0815") instead of the structured field.

How to fix it

Transmit the corrected invoice's number in BG-3 (BT-25): cac:BillingReference/cac:InvoiceDocumentReference/cbc:ID in UBL, ram:InvoiceReferencedDocument/ram:IssuerAssignedID in CII.

NormAPI provides technical validation, not tax or legal advice.