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How many days do I have to contact the Department of Homeland Security (DHS) and the Social Security Administration (SSA) regarding my Self Check dual Tentative Nonconfirmation (Mismatch)?

If you receive a Self Check mismatch from both the Department of Homeland Security (DHS) and Social Security Administration (SSA) you have 8 federal government working days to contact both agencies to take action to resolve the mismatch. You should receive a Further Action Notice with instructions telling you how to contact DHS and visit SSA in person to resolve the mismatch.