Google Contacts, the address book built into Gmail, lets you keep track of all your contacts, see when you last interacted with them, and more.
Send case agreements for signature and keep case status current.
Your signers get the agreement to sign, and you can see the request link and sent status on the case.
Send the approved case agreement and put its request link on the case.
Your agreement goes to the right signers in the order you choose, and the case gives its owner a link to the request.