Employers are required to verify the identity and employment eligibility of any person employed by the organization. The U.S. Citizenship and Immigration Service is responsible for the documentation of alien employment authorization, for Form I-9 itself, and for the E-Verify employment eligibility verification program.
Stokes, Richard, "The Immigration Reform and Control Act (I-9), E-Verify and Tennessee Employers" (2013). MTAS Publications: Full Publications.