errorGRCCIUS-GR (Greece)

GR-R-001-1:When the Supplier is Greek, the Invoice Id should consist of 6 segments

Greek supplier invoices must have an Invoice ID consisting of 6 segments. This special format is required for Greek tax authority (AADE) reporting.

Severity
Fatal
Rule set
CIUS-GR (Greece)
Country
GRC
Fix type
AUTO-FIX
Confidence
75%
Category
identifier

Engine Classification

Ensure Greek seller VAT identifier is present

Confidence: 75% · Applied automatically in pipeline

What is GR-R-001-1?

GR-R-001-1 is a fatal validation rule defined in the CIUS-GR (Greece) specification (GRC national rules). It validates the CompanyID element under PartyTaxScheme[cac:TaxScheme > ID='VAT'] 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: //cac:AccountingSupplierParty/cac:Party/cac:PartyTaxScheme[cac:TaxScheme/cbc:ID='VAT']/cbc:CompanyID

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Why This Error Matters

Invoice will be rejected by Greek validation. Greek invoices require specific ID format for myDATA reporting.

GR-R-001-1 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.

Invoice Navigator can automatically correct this error in your pipeline. The fix is applied with full audit evidence, so your compliance trail remains intact.

Validator Behavior

  • ·Causes invoice rejection
  • ·Error returned: GR-R-001-1
  • ·Specification: CIUS-GR (Greece)

Before / After

Failing XML
<Invoice>
  <!-- Issue: When the Supplier is Greek, the Invoice Id should consist of -->
</Invoice>
Corrected XML
<Invoice>
  <!-- Issue resolved per CIUS-GR (Greece) -->
</Invoice>

Technical Reference

XPath//cac:AccountingSupplierParty/cac:Party/cac:PartyTaxScheme[cac:TaxScheme/cbc:ID='VAT']/cbc:CompanyID
SpecCIUS-GR (Greece)
Operationset_default
StrategyEnsure Greek seller VAT identifier is present

Common Causes

  • ·Invoice ID does not have 6 segments
  • ·Standard invoice numbering used instead of Greek format
  • ·ERP does not generate Greek-compliant invoice IDs
  • ·Segments not properly separated
  • ·Non-Greek template used for Greek invoice

Seeing this in production? The API handles GR-R-001-1 automatically. See the fix response →

Related Errors

GR-R-003

Greek invoice type code required

GR-R-009

Greek suppliers must use their correct TIN as the electronic address for...

GR-S-011

Greek suppliers must provide their Seller Tax Registration Number, prefixed...

Last updated: 27 February 2026

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Handle GR-R-001-1 Automatically in Your Pipeline

The compliance engine auto-remediates this error with controlled safety policies and evidence pack generation.

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