Reference
Markdown exportBR-DE-19 Project reference must be provided
The project reference must be provided on the invoice.
Problem Description
The project reference must be provided on the invoice.
ERROR
XRechnung 3.0
Context and Significance
Project references help the buyer allocate costs and match the invoice to a project or budget line. Use the project ID provided by the buyer (not an internal free-text label) where possible.
Solution
Add the project reference to the invoice.
Valid Examples
Use these points as the practical checks for this section.
- PRJ-2025-0042
- Project ID provided by the buyer
Invalid Examples
Use these points as the practical checks for this section.
- Missing project reference
Code Examples
Valid XML
<cac:ProjectReference><cbc:ID>PRJ-2025-0042</cbc:ID></cac:ProjectReference>Invalid XML
<!-- Missing cac:ProjectReference -->Technical Details
Affected Fields
Project Reference