GR-R17 rules
Greece requires the invoice number itself to be structured — six segments carrying the TIN, issue date, branch, document type, series and sequence — plus a MARK number issued by myDATA, and the EL prefix on VAT identifiers, which differs from the GR country code used in addresses.
| GR-R-001-1 | fatal | When the Supplier is Greek, the Invoice Id should consist of 6 segments |
| GR-R-001-2 | fatal | When the Supplier is Greek, the Invoice Id first segment must be a valid TIN Number and match either the Supplier's or the Tax Representative's Tin Number |
| GR-R-001-3 | fatal | When the Supplier is Greek, the Invoice Id second segment must be a valid Date that matches the invoice Issue Date |
| GR-R-001-4 | fatal | When Supplier is Greek, the Invoice Id third segment must be a positive integer |
| GR-R-001-5 | fatal | When Supplier is Greek, the Invoice Id in the fourth segment must be a valid greek document type |
| GR-R-001-6 | fatal | When Supplier is Greek, the Invoice Id fifth segment must not be empty |
| GR-R-001-7 | fatal | When Supplier is Greek, the Invoice Id sixth segment must not be empty |
| GR-R-002 | fatal | Greek Suppliers must provide their full name as they are registered in the Greek Business Registry (G.E.MH.) as a legal entity or in the Tax Registry as a natural person |
| GR-R-003 | fatal | For the Greek Suppliers, the VAT must start with 'EL' and must be a valid TIN number |
| GR-R-004-1 | fatal | When Supplier is Greek, there must be one MARK Number |
| GR-R-004-2 | fatal | When Supplier is Greek, the MARK Number must be a positive integer |
| GR-R-005 | fatal | Greek Suppliers must provide the full name of the buyer |
| GR-R-006 | fatal | Greek Suppliers must provide the VAT number of the buyer, if the buyer is Greek |
| GR-R-008-2 | fatal | When Supplier is Greek, there should be no more than one invoice url |
| GR-R-008-3 | fatal | When Supplier is Greek and the INVOICE URL Document reference exists, the External Reference URI should be present |
| GR-R-009 | fatal | Greek suppliers that send an invoice through the PEPPOL network must use a correct TIN number as an electronic address according to PEPPOL Electronic Address Identifier s… |
| GR-R-010 | fatal | Greek Suppliers that send an invoice through the PEPPOL network to a greek buyer must use a correct TIN number as an electronic address according to PEPPOL Electronic Add… |