BR-DE-CVD-01: Contract reference (BT-12) is missing in the CVD invoice

What does this mean?

In an XRechnung invoice of the CVD variant (Clean Vehicles Directive, identifier in BT-24) the contract reference (BT-12) must be provided. It is missing or empty.

Typical causes

The invoice is marked as CVD invoice, but the number of the underlying contract was not entered.
The contract number only appears in a note or in another reference, e.g. the purchase order reference (BT-13).

How to fix the error

Enter the contract number from the order (CII: ram:ApplicableHeaderTradeAgreement/ram:ContractReferencedDocument/ram:IssuerAssignedID, UBL: cac:ContractDocumentReference/cbc:ID).
If no CVD invoice is intended, use the regular XRechnung identifier in BT-24.
Generate and validate the invoice again.

In E-Rechnungsfreund

In the invoice form ("Experte" view), section "Referenzen (Bestell-, Vertrags-, Projektnummern)" (references), fill in the field "Vertragsreferenz (BT-12)".

Example

Wrong

<ram:ApplicableHeaderTradeAgreement>
  <ram:BuyerReference>04011000-12350-85</ram:BuyerReference>
  ...
</ram:ApplicableHeaderTradeAgreement>

Correct

<ram:ApplicableHeaderTradeAgreement>
  <ram:BuyerReference>04011000-12350-85</ram:BuyerReference>
  ...
  <ram:ContractReferencedDocument>
    <ram:IssuerAssignedID>V-2026-0815</ram:IssuerAssignedID>
  </ram:ContractReferencedDocument>
</ram:ApplicableHeaderTradeAgreement>

Related validation rules

• BR-DE-CVD-02: Tender or lot reference (BT-17) is missing in the CVD invoice
• BR-DE-CVD-03: No invoice line with CVD vehicle details
• BR-DE-CVD-04: Invalid vehicle category in the CVD classification (BT-158)
• BR-DE-CVD-05: Invalid value of the attribute cva (BT-161)
• BR-DE-CVD-06-a: Line with CVD classification without exactly one attribute cva
• BR-DE-CVD-06-b: Line with attribute cva without exactly one CVD classification