# GR-R-003

Source: https://xmlvalid.com/rules/GR-R-003

> For the Greek Suppliers, the VAT must start with 'EL' and must be a valid TIN number

- Level: error
- Rule sets: Peppol BIS Billing 3.0 rules 3.0.21
- Context: `cac:AccountingSupplierParty[$isGreekSender]/cac:Party/cac:PartyTaxScheme[normalize-space(cac:TaxScheme/cbc:ID) = 'VAT']/cbc:CompanyID`
- Test: `substring(.,1,2) = 'EL' and u:TinVerification(substring(.,3))`

Validate a document against these rules: https://xmlvalid.com/validate