# BR-CUSTOM-VALIDATION-01

Source: https://xmlvalid.com/rules/BR-CUSTOM-VALIDATION-01

> The Seller VAT registration number or seller group VAT registration number (BT-31) of The invoice must not match the buyer VAT registration number (BT-48) .

- Level: error
- Rule sets: ZATCA e-invoicing rules (Saudi Arabia) SDK 3.4.6
- Context: `/ubl:Invoice | /cn:CreditNote`
- Test: `(( (cac:AccountingSupplierParty/cac:Party/cac:PartyTaxScheme/cbc:CompanyID) != '' and (cac:AccountingCustomerParty/cac:Party/cac:PartyTaxScheme/cbc:CompanyID) != '' and (cac:AccountingCustomerParty/cac:Party/cac:PartyTaxScheme/cbc:CompanyID) = (cac:AccountingSupplierParty/cac:Party/cac:PartyTaxScheme/cbc:CompanyID) ))`

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