Undocumented workers and their rights.

Constitutional Rights - Even if you're in the United States without permission or proper immigration documents, various sections of the U.S. Constitution apply to you. There is a particularly important provision of the Fourteenth Amendment stating that, "No state shall . . . deprive any person of life, liberty or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws."An undocumented immigrant is definitely a "person." In brief, this means that you are owed such procedural rights as a jury trial and the right to defend yourself against the charges if arrested; and if someone sues you over a civil matter, that you have the right to receive notice and to defend yourself in court. (lawyers.com)

Defense against Removal - You have the right to defend yourself against deportation or removal from the United States. If immigration officials discover that you're living in the country illegally, you have the right to a hearing before an immigration judge in the Executive Office for Immigration Review or EOIR (unless you've returned to the U.S. after a previous order of deportation). The U.S. government can't, in most cases, simply send you home without a hearing. (lawyers.com)

Protections Against Discrimination - Undocumented immigrants are legally protected against discrimination on the basis of race or nationality, by employers or anyone else. Employers must ask you for your legal authorization to be in the United States before they can hire you, but they can't single you out and ask only you, or only individuals of your nationality.

(image from google) and from Mountain View Mirror

Asking for documentation must be company policy, covering all workers. (lawyers.com)