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BR-DE-15

The buyer reference (BT-10) is missing

Validation rule of XRechnung 3.0.2 (KoSIT, Schematron 2.6.0) · Level: Error

What the message means

The buyer reference (BT-10) is missing. Public bodies give their Leitweg-ID here, companies often an order or cost centre number.

What the issuer needs to change

Enter the buyer reference; the buyer provides it.

Fields concerned

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Origin

Rule set
XRechnung 3.0.2 (KoSIT, Schematron 2.6.0)
Syntax
CII, UBL
Level
Error

Original rule text

Das Element "Buyer reference" (BT-10) muss übermittelt werden.

Source: KoSIT, XRechnung Schematron 2.6.0, Apache License 2.0

Technical details for IT

UBL

Context: /ubl:Invoice | /cn:CreditNote
Test: not(cbc:BuyerReference[boolean(normalize-space(.))])

CII

Context: /rsm:CrossIndustryInvoice
Test: not(rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:BuyerReference[boolean(normalize-space(.))])

Related rules

All validation rules

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