Send a contract. Get it signed. Receive the executed PDF.

This system uses PHP on the server. Open it through a local PHP host (for example php -S localhost:8080), not as a raw file.

Upload & send Add the PDF, client email, and contract ID. A unique link is created and can be emailed to the client.
Client signs They open sign.php?token=…, read the PDF, and draw a signature on the canvas.
Executed copy The signature is stamped onto the PDF and emailed to the client and to you.