# XV-SA-10

Source: https://xmlvalid.com/rules/XV-SA-10

> The time stamp in the QR code (tag 3, …) is not the invoice's issue date and time (…).

- 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 $fields[4] = '' or substring(normalize-space($fields[4]), 1, 19) = $issued`

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