Route to an approver who doesnt have Adobe Sign account

Hi,

This is our use case: The first person will fill out the form and sign it and submit. Then it routes to a person to review, add comments, and sign off the document. Then the document would be archived/FTP remotely in a PDF format.

Is this workflow possible by just using Adobe Sign?
Does the approver must have an Adobe Sign user enterprise account?

Thanks.

Vince