This was done last august. He had no knowledge of it and was upset when his house mate reminded him that he did in fact sign the paper (the driver is her best friend. We (his daughters are now stepping in as he has come to terms with the fact that he needs our oversight financially and healthcare wise. Can we ask the son to sign anything do that the sallie mae loan is reverted back to the boy. My father did this he thinks because he was talked into it so the boy could get a lower interest rate. Is there anything we can do? My father us going to need that money or he will pass and his estate will clearly end up paying for it. That was not my fathers intent.