Your letter must include your name, address, Social Security number, and why you disagree with the determination. Select Benefit Overpayment Services.Call a representative at (916)875-7589. The good news is that you have some options. The first is to appeal the overpayment with a request for reconsideration. The salary overpayment resulted because . After millions of unprocessed claims and a backlog of unreturned phone calls, KCRA 3 has uncovered mysterious letters popping up in the Sacramento area. Learn about the financial aid implications when you withdraw or drop all of your classes in a semester.