get https://api.ext-sandbox.fourthline.com/v1/signatures//otp
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.
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.