Under the H-1B visa program, an employer may employ foreign workers in occupations requiring theoretical or technical expertise in a specialized field. An H-1B visa holder is issued a Social Security number (SSN) but is only authorized to work for his or her sponsoring employer.

In response to a recent Department of Homeland Security (DHS) study and criminal investigations launched by the Department of Justice (DOJ) concerning visa fraud, the Social Security Administration’s Office of the Inspector General (OIG) set out to assess whether H-1B workers were properly using their SSNs. In its September 2011 Audit Report, H-1B Workers' Use of Social Security Numbers, the OIG estimated that 18% of H-1B workers assigned a SSN in 2007 may have used their SSN to work for a non-approved employer: specifically, 11% posted wages from an employer other than their approved employer, and 7% posted no wages from fiscal years 2007 to 2009.

Based on its findings, the OIG recommended that the Social Security Administration work more closely with DHS and establish a data match agreement to help DHS identify and reduce improper SSN usage by H-1B visa holders.

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