Request a sign without phone number

I wish the Adobe Sign system would allow for the phone number to be autopopulated from the Recipient's profile/account settings, so we wouldn't need to ask for the Recipient's phone number.  I don't necessarily need to see their phone number; I just need it to be sent to the right place.  The system could just send a notification to me (the Sender) that no phone number has been set up, if there's no cell/mobile number in the Recipient's Account Settings phone number field.

People are tired, used to it, want to finish the registration procedure quickly, and give the phone to them without thinking about how it will be used. They don't read the long, dryly written user agreement.

The defaul is to only have the email itsefl as authentication. If you are unable to change this option (try clicking the arrow near the mobile phone icon), your group or account admin has made this the required default. They would need to change this requirement for you,