I purchased a vehicle from a friend for $700. On the day i purchased it i could only pay her $500 and she had me sign a paper saying i payed that and owed her $200. That paper was not notarized, just an agreement between us. Unfortunately i have not been able to pay her and she wants to take it to court. My question is do i technically owe her when the sale receipt says it was sold from her to me for $500 and that document is notarized since she had to sign the car over to me?