What it means
For a Greek seller, the buyer's cac:PartyName/cbc:Name must contain at least one character. This is the buyer trading name (BT-45), and the check applies regardless of the buyer's country. The XPath does not trim whitespace or assess whether the name is complete.
Why it matters
The Greek rule asks for the buyer's name in this specific field. An identifier or a name recorded only in another field does not satisfy the check.
How to fix it
Enter the buyer's full name in the buyer trading name field and confirm that your UBL export writes it to cac:AccountingCustomerParty/cac:Party/cac:PartyName/cbc:Name. A name recorded only in the legal-name field is not enough for this check. Do not use spaces as a substitute for a name. Check the corrected file again.
Once the file is corrected, check it again for free: Validate a Peppol BIS invoice
Or fix the invoice in a form and download the corrected file, for 1 credit: Fix a rejected e-invoice
The rule as published
Read the rule on the publisher's site
Where this rule applies
| Rule set | Version |
|---|---|
| Peppol BIS Billing 3.0 (invoice) | 2026.5 |
| Peppol BIS Billing 3.0 (credit note) | 2026.5 |
Check your file
Drop your e-invoice to see whether GR-R-005 still fails, and which other rules do.
Related rules
- GR-R-006 A Greek seller must give a Greek buyer's VAT number
- GR-R-009 A Greek seller's electronic address must be its TIN (scheme 9933)
- GR-R-010 A Greek buyer's electronic address must be its TIN (scheme 9933)
- GR-R-003 A Greek seller's VAT number must start with EL and be valid
- GR-R-002 A Greek seller must give its registered name