# BR-KSA-81

Source: https://xmlvalid.com/rules/BR-KSA-81

> The other Buyer ID (BT-46) must present in the tax invoice and associated debit notes and credit notes (KSA-2, position 1 and 2 = 01), where the buyer VAT registration number or buyer group VAT registration number (BT-48) is not provided.

- Level: warning
- Rule sets: ZATCA e-invoicing rules (Saudi Arabia) SDK 3.4.6
- Context: `cac:AccountingCustomerParty/cac:Party/cac:PartyIdentification/cbc:ID`
- Test: `cac:AccountingCustomerParty/cac:Party/cac:PartyIdentification/cbc:ID`

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