Analysis of information sources in references of the Wikipedia article "Death Master File" in English language version.
On November 1, 2011, the Social Security Administration (SSA) implemented an important change in the Death Master File (DMF) data. NTIS, a cost-recovery government agency, disseminates the Limited Access DMF on behalf of SSA. The Limited Access Death Master File contains data on decedants who died less than 3 years ago.