GR-R-004-1
Error Guide
🇬🇷 GR-R-004-1: When Supplier is Greek, there must be one MARK Number in Greece
ErrorPlannedNeeds Input
Greek supplier invoices must include one MARK (Μοναδικός Αριθμός Καταχώρησης) number. This is the unique registration number from the Greek myDATA system.
Quick Facts
Severity
Error (rejection)
Ruleset
PEPPOL_BIS
Mandate
Planned
Fix Type
Needs input
Why This Matters in Greece
Greece is planning e-invoicing using myDATA XML, EN 16931, Peppol BIS 3.0 (for B2G delivery). Invoices with this error will be rejected. They cannot be processed for Greece compliance.
How to Fix GR-R-004-1
Greek supplier invoices must include one MARK (Μοναδικός Αριθμός Καταχώρησης) number. This is the unique registration number from the Greek myDATA system.
Greece E-Invoicing Requirements
Phase
Status
Scope
myDATA reporting
Live (Jul 2021)
All businesses (mandatory)
B2G
Live (Sep 2025)
All public contracts
B2B Phase A
Live (Feb 2026)
Large businesses (>€1M revenue in 2023)
B2B Phase B
Oct 2026
All remaining businesses
Common Causes
- •MARK number not included in invoice
- •Invoice not yet registered with myDATA
- •ERP does not capture MARK numbers
- •MARK field not mapped in export
- •Manual invoice without myDATA registration
Fix GR-R-004-1 automatically
Upload your invoice and let Invoice Navigator auto-remediate this error.