From the Summary: "Many years of debate about unauthorized immigration to the United States culminated in 1986 in the enactment of the Immigration Reform and Control Act (IRCA). This law sought to address unauthorized immigration, in part, by requiring all employers to examine documents presented by new hires to verify identity and work authorization and to complete and retain employment eligibility verification (I-9) forms. Ten years later, in the face of a growing illegal alien population, Congress attempted to strengthen the employment verification process by establishing pilot programs for electronic verification, as part of the Illegal Immigration Reform and Immigrant Responsibility Act of 1996 (IIRIRA). […] Legislation on electronic employment eligibility verification has been introduced in the 112th Congress. In weighing such proposals, Congress may find it useful to evaluate them in terms of their potential impact on a set of related issues: unauthorized employment; verification system accuracy, efficiency, and capacity; discrimination; employer compliance; privacy; and verification system usability and employer burden. This report will be updated as developments warrant."
CRS Report for Congress, R40446