One of the most popular email services, Gmail keeps track of all your emails with threaded conversations, tags, and Google-powered search to find any message you need.
Send approved agreements for signature and give requesters a view link.
Your signer gets a private link to sign the agreement. Your coworker gets a separate link to view the request.
Send the final renewal agreement to its current signers.
Your renewal agreement reaches the right signers before its deadline, and you get an email showing who was invited and when.
Send final agreements for signature and confirm the request ID.
Your final agreements reach the signers you list, and you get a reply with the invitation details in the original email thread.