BR-DE-05:Seller contact email is required for German B2G invoices
XRechnung to German public sector requires valid Leitweg-ID as buyer reference.
Engine Classification
Business data required · Explicit input workflow · No assumptions made
Required input: Leitweg-ID
What is BR-DE-05?
BR-DE-05 is a fatal validation rule defined in the XRechnung (Germany) specification (DEU national rules). It validates the BuyerReference element under Invoice in the UBL invoice XML.
When this rule fires, the invoice is non-compliant and will be rejected by Peppol access points and national validation services. The sending system receives a rejection response and the invoice does not reach the buyer.
Target path: XPath: /Invoice/cbc:BuyerReference
Why This Error Matters
German government portals (ZRE, OZG-RE) route invoices based on Leitweg-ID.
BR-DE-05 is a hard failure. Invoices that trigger this rule are rejected at the access point and never reach the recipient. In Peppol networks, this means your sending system receives an MLR (Message Level Response) with a rejection status. The invoice must be corrected and re-sent, adding delay to your payment cycle.
Validator Behavior
- ·Causes invoice rejection
- ·Rejected by XRechnung endpoints
- ·Error returned: BR-DE-05
- ·Specification: XRechnung (Germany)
How to Fix It
Get Leitweg-ID
From public sector buyer (format: 04011000-12345-67)
Add to BuyerReference
Place in cbc:BuyerReference element
Validate format
Must match Leitweg-ID pattern
Before / After
<cac:Contact> <!-- cbc:ElectronicMail is missing --> </cac:Contact>
<cac:Contact> <cbc:ElectronicMail>valid-value</cbc:ElectronicMail> </cac:Contact>
Technical Reference
XPath: /Invoice/cbc:BuyerReferenceCode Example
<cbc:BuyerReference>04011000-12345-67</cbc:BuyerReference>Common Causes
- ·Wrong format
- ·Missing Leitweg-ID
- ·Invalid checksum
Seeing this in production? The API handles BR-DE-05 automatically. See the fix response →
Commonly Seen In
Frequently Asked Questions
XRechnung to German public sector requires valid Leitweg-ID as buyer reference.
Add correctly formatted Leitweg-ID. Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.
Yes, BR-DE-05 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.
BR-DE-05 requires specific business data to resolve. Invoice Navigator detects the error and guides you through providing the needed information, then applies the fix with full audit documentation.
BR-DE-05 is commonly seen in exports from All German invoicing software. These software packages sometimes generate invoices that need adjustment to meet full compliance standards.
Related Content
Last updated: 3 March 2026
Resolve BR-DE-05 with Guided Input
The compliance engine detects this error and prompts for the required business data before applying a safe, auditable fix.