errorGRCCIUS-GR (Greece)

GR-R-001-2:The first segment of Greek invoice ID must be a valid TIN matching the...

The first segment of Greek invoice ID must be a valid TIN matching the supplier or tax representative. This links the invoice to the correct Greek tax entity.

Severity
Fatal
Rule set
CIUS-GR (Greece)
Country
GRC
Fix type
AUTO-FIX
Confidence
85%
Category
identifier

Engine Classification

Normalize Greek VAT identifier to EL prefix format

Confidence: 85% · Applied automatically in pipeline

What is GR-R-001-2?

GR-R-001-2 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. Invoice ID TIN must match registered entity for tax compliance.

GR-R-001-2 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-001-2
  • ·Specification: CIUS-GR (Greece)

Before / After

Failing XML
<Invoice>
  <!-- Issue: When the Supplier is Greek, the Invoice Id first segment mus -->
</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)
Operationnormalize
StrategyNormalize Greek VAT identifier to EL prefix format

Common Causes

  • ·First segment is not a valid TIN
  • ·TIN does not match supplier or tax rep
  • ·Wrong TIN used in invoice ID
  • ·TIN format incorrect
  • ·Invoice ID manually created with wrong TIN

Seeing this in production? The API handles GR-R-001-2 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-001-2 Automatically in Your Pipeline

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

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