E-Verify is a free Internet-based system that compares information from an employee’s Form I-9 to data supplied by  the federal government to confirm whether the individual is authorized to work in the United States. According to the Department of Homeland Security (DHS), more than 387,000 employers, large and small, across the United States use E-Verify to check the employment eligibility of new employees, and about 1,200 new businesses sign up for the service each week.