whats next in my seller financing deal

[Matthew Tierney]

hey BPers so ive been going back and forth with the owner of a single family home next door to a rental of mine in philadelphia 19134. i brought up seller financing and we agreed to a price and for him to carry back the mortgage. the only problem is i have no idea what to do next!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

agreement of sales?, title search?, go down to city hall and record the contract?? im sure i can stumble my way to the finish line but i was hoping this wonderful community of savvy veterans had some great guidance to spare ......................THANK YOU in advance everyone