A Social Security overpayment letter can turn an ordinary mailbox opening into a very unpleasant piece of paperwork. The notice may say you received more money than you should have, explain the amount, and tell you how Social Security plans to recover it. What matters next is not simply whether you agree with the bill. Several clocks can start running, and missing one can change what happens to your monthly benefit.
The tricky part is that these time limits do different jobs. One gives you time to repay, another protects your benefits while Social Security reviews an appeal, and another concerns a request to have the debt waived. The letter can look like a demand for money, but it also describes several ways to challenge or manage the overpayment. That makes the calendar on the notice almost as important as the dollar amount.