Social Security's Death Master File (DMF), a public record of the names and Social Security numbers of individuals whom Social Security believes to have died, has come under criticism lately. There have been many names on the DMF of individuals who are very much alive. These individuals have lost Social Security and other government benefits until the problem is resolved, a process that can take months. They have also suffered problems as non-governmental entities such as banks treat them as deceased. There is also the threat of identity theft.
Social Security has responded to the criticism by altering the DMF. Social Security will no longer accept state death records as proof of death.
Unfortunately, this will inevitably lead to an increased problem of Social Security checks and direct deposits continuing to be sent to deceased individuals. Most of the families of those involved will return the money but not all. I can easily predict a round of investigations and Congressional hearings on this fraud at some point in the future.
By the way, the first people to notice the change in the DMF were genealogists. They make extensive use of the DMF.