Peppol BIS Billing 3.0 · rule
GR-R-001-1
What does GR-R-001-1 mean? When the Supplier is Greek, the Invoice Id should consist of 6 segments
Why did my invoice fail GR-R-001-1?
When the supplier is Greek, the invoice number (BT-1) must be a composite identifier made of six segments: a TIN, the issue date, a sequence number, a Greek document-type code, and two further non-empty segments (each defined precisely by GR-R-001-2 through GR-R-001-7). Greece requires this structured identifier so invoices can be cross-checked against the Greek tax platform (myDATA); the official rule text does not itself mandate a specific separator character between segments, so follow your Peppol access point's or PDP's exact concatenation format.
Official rule text
When the Supplier is Greek, the Invoice Id should consist of 6 segments
Common causes
- A plain sequential invoice number (e.g. INV-2026-001) used instead of the six required segments
- One of the six segments left empty or omitted entirely
- The wrong TIN (neither the supplier's nor the tax representative's) in the first segment, or a date not matching the invoice issue date in the second
Related rules
GR-R-001-2 · GR-R-001-3 · GR-R-001-4 · GR-R-001-5 · GR-R-001-6 · GR-R-001-7
Paste it into the live demo, or call POST /v1/validate. See the quickstart.