GR-R-004-2fatal
How to fix GR-R-004-2
When Supplier is Greek, the MARK Number must be a positive integer
What this rule checks
The MARK number assigned by Greece's IAPR/myDATA system must be a positive integer value, as it is a sequential registration number from the tax authority.
How to fix it
Ensure the MARK number in AdditionalDocumentReference/ID is a positive whole number with no decimals, spaces, or non-numeric characters.
Related rules
Validate your invoice
Upload your corrected invoice to check it passes GR-R-004-2 and all other EN 16931 and Peppol BIS 3.0 rules. Free, instant, no signup.