Mother in law bought used Ford Fiesta at liberty auto sales in KY. and gave 2-3 thousand more than it was worth. Me and her son knew nothing of the car until a salesman or finance man called her son and wanted him to come in and co- sign the loan, which he was shocked to have had to find out about her trading her older car in for a newer one. He refused to cosign, but they sold it to her anyway. Forward time a year and a half and a broke hip later, we moved her to tennessee to take care of her (by this time she could not drive safely and has dementia, cannot take care of herself requiring home health. She could not afford the almost 300.00 dollars a month car payment on her 950.00 dollar social security income. The bank was called and told she cannot pay her payments anymore aND she wants to voluntarily surrender the car.. They sent 2 people to get the car. Also, she was paid up to date on her payments. Now the bank sent her a letter saying the car had been auctioned off and it did not sell for enough to pay it off and that she still owed 5,000.00 dollars, and even offered to set up payments so she could pay off the unpaid remainder. She is 90 years old. My question is, is it legal to sell a car to an extremely old person who has dementia?