An employment authorization document (EAD, Form I-765), EAD card, known popularly as a "work permit", is a document issued by United States Citizenship and Immigration Services (USCIS) that provides its holder a legal right to work in the US. It is similar to, but should not be confused with the green card. Certain 'aliens' (non-residents) who are temporarily in the United States may file a Form I-765, application for employment authorization, to request an EAD. An EAD is issued for a specific period of time based on alien's immigration situation. Foreign nationals with an EAD can lawfully work in the United States for any employer. Aliens who are sponsored by US employers and issued temporary work visas for such as H, I, L-1 or O-1 visas are authorized to work for the sponsoring employer, through the duration of the visa . This is known as 'employment incident to status'. Aliens on such work visas do not qualify for an EAD according to the US Citizenship and Immigration Service regulations (8 CFR Part 274a). Currently the EAD is issued in the form of a standard credit card-size plastic card enhanced with multiple security features. The EAD card contains some basic information about alien: name, birth date, sex, immigrant category, country of birth, photo, alien registration number (also called "A-number"), card number, restrictive terms and conditions, and dates of validity.