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BR-55

Missing in the preceding invoice reference: preceding invoice reference (BT-25)

Validation rule of EN 16931 (CEN, rule set 1.3.16) · Level: Error

What the message means

Missing in the preceding invoice reference: preceding invoice reference (BT-25).

What the issuer needs to change

Add the preceding invoice reference.

Fields concerned

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Origin

Rule set
EN 16931 (CEN, rule set 1.3.16)
Syntax
CII, UBL
Level
Error

Original rule text

Each Preceding Invoice reference (BG-3) shall contain a Preceding Invoice reference (BT-25).

Source: CEN/TC 434, EN 16931 validation rules 1.3.16, European Union Public Licence 1.2

Technical details for IT

UBL

Context: cac:BillingReference
Test: not(exists(cac:InvoiceDocumentReference/cbc:ID))

CII

Context: /rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:InvoiceReferencedDocument
Test: not(normalize-space(ram:IssuerAssignedID) != '')

Related rules

All validation rules

Technical explanation by robin.vision, not tax or legal advice. Rules as of 31 August 2026 (KoSIT validator configuration).