If you are paid too much, the Social Security Administration almost always figures it out eventually. Then, after you have already spent all of the money, it will send you a letter demanding that you repay the overpayment. If you do not have the money to repay the full amount of the overpayment, the Social Security Administration may threaten to cut off your checks until the overpayment is recouped. Usually it will accept a more reasonable reduction of your monthly checks, but this is still a hassle and you may have trouble making ends meet during the time that your check is reduced. Under some circumstances it may be possible to get repayment of all or part of the overpayment waived; but this is not something to count on.