LodgeiT uses signatory's contact details to send e-signature (via Client's Settings)
The default details are the information from the "Contact Details" -


User has an option to change directly to e-signature page. 

Click the pencil icon, and it will switch to custom mode, where the user can edit name and email.


Client Settings > "General" for Birthdate 

Related Article:

Process of "Out to Sign" using E-signature

How to notify signed tax form to other team members

How to send email directly to agent's mailbox

E-sign Reminder

E-signature Template

E-sign status card

Signing Documents Electronically Under Corporations Act 2001