The E-Verify program is a key component of employment law in the United States. Why? Federal law obliges all companies to ensure that only citizens of the United States (or foreign citizens who have received the requisite legal authorization to work in the country) are able to take up jobs in America. Although the United States is unparalleled when it comes to its diversity, this does sometimes invite problems concerning unauthorized employment. The E-Verify system directly addresses these problems. In addition, it is Internet based—meaning that companies are able to quickly process applications. This helps them determine whether their employees, or their potential employees, have the legal right to work in the country.