Filling out an I-9 form is one of the finals steps to hiring a new employee. The purpose of an I-9 form is to verify that an employee is eligible to work in the United States. The United States Department of Justice, Immigration and Naturalization Service requires that the I-9 form be completed within the employee’s first three days of work. Notice regarding expiration of control number on Form I-9, Employment Eligibility Verification: The Office of Management and Budget (OMB) control number on the current Form I-9 expired March 31, 2007. USCIS is working on issuing a Form I-9 with an updated control number. This expiration does not affect employer's requirements to comply with employment eligibility verification responsibilities, and employers should continue to use this current version of the Form I-9 until an updated form is posted.