The E-Verify online program to determine employee eligibility to work in the U.S. has been extended three years as a requirement for federal contractors and subcontractors.

The E-Verify mandate was set to expire on Sept. 30, but Congress included an extension until Sept. 30, 2015, in a recent piece of legislation. Several states also have in place various requirements for verifying job applicants' right to work in the U.S. through the online database known as E-Verify.

The Immigration Reform and Control Act (IRCA) of 1986 made it unlawful for an employer “to hire, or to recruit or refer for a fee, for employment in the United States an alien knowing the alien is an unauthorized alien.” E-Verify searches various government databases to insure a job applicant has the legal right to work here.