Adobe Sign Webform-need two signatures without email addresses to send to

Good day,

We are a Middle and High school based program that requires signatures from our students and their parents on the same documents. We are using Adobe Sign Webform, which only allows for an signer and approver(myself). This Web Form(pdf) is an application for families to apply to our program, so we do not have their email addresses beforehand.

We have also tried Adobe sign, but as I stated before this is a document to be posted on our website so we do not have email addresses beforehand.

 I would appreciate any helpful information.

Thanks