DMF means Death Master File provided by Social Security Administration (SSA). DMF file is created from internal SSA records of deceased persons possessing social security numbers and whose deaths were reported to the SSA. DMF file includes the following information on each decedent, if the data are available to the SSA:
Free Death Master File Database provide free DMF check by Social Security Number(SSN), you can check if a SSN number is included in the DMF report or not. The SSA does not have a death record for all persons; therefore, SSA does not guarantee the veracity of the file. Thus the absence of a particular person is not proof this person is alive. Use the Free DMF data at your own risk.