We currently support OTP via SMS as the authentication means for signature. You can allow the participant to sign without authentication or define the participant’s phone number when configuring your transaction.
In case you allow authentication, select the country code and enter the participant phone number. Then, choose among the following options:
- Allow Universign or the signer to use a different phone number that might be more appropriate.
- Allow Universign or the signer to use a different phone number only for advanced signatures (we will always use the phone number defined on your side if the signature is simple).
- Do not allow Universign or the signer to use a different phone number that might be more appropriate.
