# XV-SA-09

Source: https://xmlvalid.com/rules/XV-SA-09

> The VAT number in the QR code (tag 2, …) is not the seller's (…).

- Level: error
- Rule sets: ZATCA cryptographic stamp and QR code checks Security Features Implementation Standards 1.1, SDK 3.4.6
- Context: `/*/cac:AdditionalDocumentReference[cbc:ID = 'QR']`
- Test: `not($readable) or $fields[3] = '' or normalize-space($fields[3]) = $vat`

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