GR-R-001-1:When the Supplier is Greek, the Invoice Id should consist of 6 segments
Fix: Greek supplier invoices must have an Invoice ID consisting of 6 segments. This special format is required for Greek tax authority (AADE) reporting. Upload your invoice to fix this automatically.
Greek supplier invoices must have an Invoice ID consisting of 6 segments. This special format is required for Greek tax authority (AADE) reporting.
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 rejected by Peppol access points and never reaches the buyer.
Target path: //cac:AccountingSupplierParty/cac:Party/cac:PartyTaxScheme[cac:TaxScheme/cbc:ID='VAT']/cbc:CompanyID
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 — the invoice must be corrected and re-sent before it can reach the recipient.
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)
How to Fix It
Find the missing or empty field
Check cbc:CompanyID at //cac:AccountingSupplierParty/cac:Party/cac:PartyTaxScheme[cac:TaxScheme/cbc:ID='VAT']/cbc:CompanyID. This field is required but is either missing or empty.
Set the required value
Greek supplier invoices must have an Invoice ID consisting of 6 segments. This special format is required for Greek tax authority (AADE) reporting.
Re-validate your invoice
Upload the corrected invoice to confirm GR-R-001-1 is resolved.
Before / After
<Invoice> <!-- Issue: When the Supplier is Greek, the Invoice Id should consist of --> </Invoice>
<Invoice> <!-- Issue resolved per CIUS-GR (Greece) --> </Invoice>
Technical Reference
//cac:AccountingSupplierParty/cac:Party/cac:PartyTaxScheme[cac:TaxScheme/cbc:ID='VAT']/cbc:CompanyIDCommon 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 →
Frequently Asked Questions
Greek supplier invoices must have an Invoice ID consisting of 6 segments. This special format is required for Greek tax authority (AADE) reporting.
Greek supplier invoices must have an Invoice ID consisting of 6 segments. This special format is required for Greek tax authority (AADE) reporting. You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.
Yes, GR-R-001-1 is a critical error that will cause invoice rejection. It must be fixed before submission.
Many instances of GR-R-001-1 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.
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Last updated: 14 April 2026
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