Your letter must include your name, address, Social Security number, and why you disagree with the determination. Select Benefit Overpayment Services.Customer: sat 9217 I received a potential overpayment letter from California edd for several weeks in the months of march to june of 2016. This model letter as a legally approved form for a client to use when informing an employee about correcting a wage overpayment. The salary overpayment resulted because .