The Membership Checklist can be used to see what documents a member has signed and what documents a member has not signed. This is found under Reports>>Memberships>>Membership Checklist.
Two fields are available:
Missing Signed Documents and Show Signed Documents
In order for a document to show on this report, the document must be required for memberships. To enable this field, go to Functions>>Documents>>Document List and check off "Required to be signed for Memberships". This will include the document on the Membership Checklist.