Having an Employment Authorization Document (Form I-766/EAD) is one way to prove that you are authorized to work in the United States for a specific time period. To request an EAD, you generally must file Form I-765, Application for Employment Authorization. You will need to apply for an EAD if you:

A U.S. Work Visa is a document that allows a foreign national to enter the United States in order to work legally in the country for a specific time period. An Employment Authorization Document (EAD) is a card that grants an immigrant permission to work in the United States legally.

Certain aliens noncitizens who are in the United States may file Form I-765, Application for Employment Authorization, to request employment authorization and an Employment Authorization Document (EAD).

If you are not a citizen or a lawful permanent resident, you may need to prove that you can work in the United States by presenting an Employment Authorization Document (Form I-766/EAD). You may apply for an EAD if you are eligible.