DE-R-028
Error Guide
š©šŖ DE-R-028: Invalid email format. The seller contact email (BT-43) must contain exactly one @ sign with at least two characters on e in Germany
WarningMandatory
Invalid email format. The seller contact email (BT-43) must contain exactly one @ sign with at least two characters on each side, and no dots at start or end.
Quick Facts
Severity
Warning
Ruleset
PEPPOL_BIS
Fix Confidence
80%
Mandate
B2B Mandatory
Fix Type
Manual
Why This Matters in Germany
Germany requires e-invoicing using XRechnung (UBL), XRechnung (CII), ZUGFeRD 2.x. This warning may cause processing delays in Germany. While not immediately rejected, it should be fixed for compliance.
Invoice Navigator covers 147 XRechnung 3.0.2 rules for Germany. Auto-remediates 89% of top rejection errors.
How to Fix DE-R-028
Invalid email format. The seller contact email (BT-43) must contain exactly one @ sign with at least two characters on each side, and no dots at start or end.
Germany E-Invoicing Requirements
Phase
Status
Scope
B2G
Live (Nov 2020)
All federal suppliers
B2B receiving
Live (Jan 2025)
All German businesses
B2B sending
Jan 2027
>ā¬800K annual revenue
B2B sending
Jan 2028
All businesses
Common Causes
- ā¢Seller email address format invalid
- ā¢BT-43 must contain exactly one @ with valid structure
- ā¢cbc:ElectronicMail missing @ or has invalid format
- ā¢Email has whitespace around @ or invalid characters
- ā¢Dot at start/end or adjacent to @ in email address
Fix DE-R-028 automatically
Upload your invoice and let Invoice Navigator auto-remediate this error.