# DK-R-017

Source: https://xmlvalid.com/rules/DK-R-017

> For Danish Customers it is mandatory to specify schemeID as "0184" (DK CVR-number) when PartyLegalEntity/CompanyID is used for AccountingCustomerParty

- Level: error
- Rule sets: Peppol BIS Billing 3.0 rules 3.0.21
- Context: `ubl-creditnote:CreditNote[$DKSupplierCountry = 'DK' and $DKCustomerCountry = 'DK']/cac:AccountingCustomerParty/cac:Party | ubl-invoice:Invoice[$DKSupplierCountry = 'DK' and $DKCustomerCountry = 'DK']/cac:AccountingCustomerParty/cac:Party`
- Test: `not(((boolean(cac:PartyLegalEntity/cbc:CompanyID)) and (normalize-space(cac:PartyLegalEntity/cbc:CompanyID/@schemeID) != '0184')))`

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