If the signer does not have email or telephone, see how to make sure that this data is not requested at the signing!
After clicking the New+ button on the left and uploading the document(s) to be signed:
1) Activate the "advanced authentication" button.
2) To disable email, tap the 'letter' icon. To disable phone, tap the phone icon, as shown below:
It is not possible not to ask for e-mail and phone at the same time. We need at least one of these data to identify the signer.
Both the document signature screen and the Signature Log will contain only the fields you requested.