In the United States, employers are required to keep on file a the Employment Eligibility Verification Form, Form I-9, for all employees for a period of three years from the date of hire or one year from the date of the employee termination, whichever is later. Form I-9 documents an employee's right to work in the United States and his legal identity. The form lists which documents the employee may produce to verify work authorization and identity. Some documents, such as a U.S. Passport or U.S. Passport Card, may be used to verify both identity and work authorization, while others, such as a State-issued driver's license or ID card, verify only identity and must be produced in conjunction with a document to verify work authorization, such as a Social Security Card. Employers do not file this Form with any government entity, while they are required to keep it on file, accessible for inspection upon request by an authorized government official or agent.