GR-R-005: Greek Suppliers must provide the full name of the buyer

StandardPeppol BIS Billing 3.0 country rules (NL, DE, IT, SE, DK, NO, GR, IS)CountryGreeceSeverityError: the invoice is rejectedSyntaxUBLApplies toOnly when the seller (or for some rules the buyer) is in the named country: the rule is triggered by the country code of the party. Dutch rules implement NLCIUS, German rules the XRechnung requirements inside Peppol.

Official rule text

[GR-R-005] Greek Suppliers must provide the full name of the buyer

Why this error occurs

The validator evaluates the XPath test above against the context element; the assertion is false for your file.

How to fix it

Compare your file with the rule text and the test expression, adjust the element named in the context, and validate again.

What the validator checks

Checked element (context):

UBL

cac:AccountingCustomerParty[$isGreekSender]/cac:Party

Test (XPath):

string-length(./cac:PartyName/cbc:Name)>0

Check your invoice

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Same check via API:

curl -F file=@invoice.xml https://einvoicechecker.com/v1/validate

Related rules

GR-R-002 Greek Suppliers must provide their full name as they are registered in the Greek…
GR-R-003 For the Greek Suppliers, the VAT must start with 'EL' and must be a valid TIN number
GR-R-006 Greek Suppliers must provide the VAT number of the buyer, if the buyer is Greek
GR-R-009 Greek suppliers that send an invoice through the PEPPOL network must use a correct TIN…
GR-R-010 Greek Suppliers that send an invoice through the PEPPOL network to a greek buyer must…

Frequently asked questions

What does GR-R-005 mean?

GR-R-005 is a peppol national rule: Greek Suppliers must provide the full name of the buyer

Will my invoice be rejected because of GR-R-005?

Yes. GR-R-005 is flagged "fatal"; validators (KoSIT, Peppol access points, the German ZRE/OZG-RE portals, KSeF) reject the invoice until it is fixed.

Which formats does GR-R-005 apply to?

Only when the seller (or for some rules the buyer) is in the named country: the rule is triggered by the country code of the party. Dutch rules implement NLCIUS, German rules the XRechnung requirements inside Peppol. Syntax: UBL.

Source: Peppol BIS Billing 3.0.20 national rules (November 2025). Catalogue generated from the official rule sets on 2026-10-15.