I received Survivor benefits after my father's death . I turned 18 in 1996. I got a letter stating I must repay $2500 of "overpayment" that I received in 1996. They apparently continued to send me benefits after I graduated from HS. I continued on to college in Sept. 1996. What are my rights here? Seriously, they want me to pay them $2500 for a mistake they made in 1996?