errorGRCubl-2.1

GR-R-002:myDATA reporting required

Greek invoices must be reported to myDATA (AADE).

Severity
Fatal
Rule set
ubl-2.1
Country
GRC
Fix type
BLOCKED

Engine Classification

Financial or legal field · Modification blocked by policy

Reason: Greek invoices must be reported to myDATA (AADE tax authority system). This requires integration with the myDATA API and cannot be done by modifying the invoice XML. Use invoicing software with myDATA reporting capability.

What is GR-R-002?

GR-R-002 is a fatal validation rule defined in the ubl-2.1 specification (GRC national rules). It validates the myDATA API integration element in the UBL invoice XML.

When this rule fires, the invoice is non-compliant and will be rejected by Peppol access points and national validation services. The sending system receives a rejection response and the invoice does not reach the buyer.

Target path: myDATA API integration

This error requires manual correction — financial fields are protected by policy.

Why This Error Matters

Greek law requires myDATA reporting.

GR-R-002 is a hard failure. Invoices that trigger this rule are rejected at the access point and never reach the recipient. In Peppol networks, this means your sending system receives an MLR (Message Level Response) with a rejection status. The invoice must be corrected and re-sent, adding delay to your payment cycle.

Validator Behavior

  • ·Causes invoice rejection
  • ·Fails UBL schema validation
  • ·Error returned: GR-R-002
  • ·Specification: ubl-2.1

How to Fix It

1.

Submit to myDATA

Via AADE platform or API

2.

Get MARK

Unique authentication code

3.

Add to invoice

Include MARK reference

XML Example

Generic example based on the rule's target XPath. Your actual XML structure may differ.

Before
<!-- Triggers validation error -->
<myDATA API integration></myDATA API integration>
After
<!-- Corrected -->
<myDATA API integration>VALID_VALUE</myDATA API integration>

Technical Reference

XPathmyDATA API integration
Specubl-2.1

Common Causes

  • ·Not submitted to myDATA
  • ·Missing MARK

Seeing this in production? The API handles GR-R-002 automatically. See the fix response →

Frequently Asked Questions

Greek invoices must be reported to myDATA (AADE).

Submit invoice to myDATA and include MARK. Invoice Navigator can help identify and fix this issue.

Yes, GR-R-002 is a critical error that must be fixed.

Related Errors

GR-R-001

Greek AFM (VAT number) required

GR-R-003

Greek invoice type code required

Last updated: 27 February 2026

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