# BR-KSA-56

Source: https://xmlvalid.com/rules/BR-KSA-56

> For credit notes ((BT-3) has the value of 381) and debit notes ((BT-3) has the value of 383), the billing reference ID (BT-25) is mandatory.

- Level: warning
- Rule sets: ZATCA e-invoicing rules (Saudi Arabia) SDK 3.4.6
- Context: `/ubl:Invoice[cbc:InvoiceTypeCode = '381'] | /ubl:Invoice[cbc:InvoiceTypeCode = '383']`
- Test: `exists(//cac:BillingReference/cac:InvoiceDocumentReference/cbc:ID) and (//cac:BillingReference/cac:InvoiceDocumentReference/cbc:ID) != ''`

> For credit notes ((BT-3) has the value of 381) and debit notes ((BT-3) has the value of 383), the billing reference ID (BT-25) is mandatory.

- Level: warning
- Rule sets: ZATCA e-invoicing rules (Saudi Arabia) SDK 3.4.6
- Context: `/ubl:Invoice[cbc:InvoiceTypeCode = '381'] | /ubl:Invoice[cbc:InvoiceTypeCode = '383']`
- Test: `not(count(//cac:BillingReference) > 0)`

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