# BR-KSA-34

Source: https://xmlvalid.com/rules/BR-KSA-34

> The invoice counter value (KSA-16) contains only digits.

- Level: error
- Rule sets: ZATCA e-invoicing rules (Saudi Arabia) SDK 3.4.6
- Context: `/ubl:Invoice | /cn:CreditNote`
- Test: `matches(cac:AdditionalDocumentReference/cbc:UUID, '^[0-9]*$')`

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