# GR-R-001-2

> 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

Checked against Peppol BIS Billing 3.0 2026.5

Canonical: https://einvoicecheck.eu/rules/gr-r-001-2

## Official rule text

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