Sandbox environment only: Use this endpoint to get a one-time passcode to confirm a test signature, without requiring a valid mobile phone number. The signature status must be confirmation_required.

Important: If you have InfoCert configured as one of your QTSPs, you do not need to make this request because the passcode is the same as the last 8 digits of the mobile phone number.

Example:
• Phone number: +39 11111112222
• Passcode: 11112222

Tip: To automate testing the signature flow, in the Upload mobile phone number request, provide a dummy mobile phone number in the following format:
+39 111111234567. You can change the digits 234567 as required.