Type up a Paper that says "BILL OF SALE" then put this in.
I ___ am selling my ___ vin #_____ to _____ for the sum of $_____. This is a complete and final transfer of ownership.
Then put in seller and buy info at the bottom. He will still need the title though.
The paper work needed to transfer ownership of a car changes from state to state. The most important part is an official deed with both your signatures on it. Also try going to the DMV together to see if there's any other paperwork to fill in for your state.
generally speaking u will have to go with him to a notary and get the title changed out of ur name and into his/ so u would not need a reciept they would simply ask how much he got it from u for.do him a favor and tell them $100