Form I-9, officially the Employment Eligibility Verification, is a United States Citizenship and Immigration Services form. Mandated by the Immigration Reform and Control Act of 1986, it is used to verify the identity and legal authorization to work of all paid employees in the United States. All U.S. employers must ensure proper completion of Form I-9 for each individual they hire for employment in the United States. Requirements The Immigration Reform and Control Act of 1986 (IRCA) required employers to verify that all newly hired employees presented facially valid documentation verifying the employee's identity and legal authorization to accept employment in the United States. The I-9 form, or more properly the Employment Eligibility Verification Form, is provided by the federal government for that purpose. Every employee hired after November 6, 1986 must complete an I-9 form at the time of hire. Employees must complete Section 1 of the form upon commencing employment. The employer must complete Section 2 within three days of the employee's starting date at work. The employer is responsible for ensuring that the forms are completed properly and in a timely manner. The I-9 is not required for unpaid volunteers or for contractors. However, a company could still find itself liable if it contracts work to a contractor it knows either is or employs unauthorized workers. Multiple versions of Form I-9, Employment Eligibility Verification, have been issued since the form was first introduced in 1987; not all versions are valid for use. Currently, only forms showing the following revision date are valid: "Rev. 07/17/2017 N*". If an employee cannot read or cannot write in English, a translator or preparer may complete the form and sign it on behalf of the employee. The form also requires the employee's own signature. In October 2004, new legislation made it possible to complete the I-9 electronically. Prerequisites for employees In completing form I-9, prospective employees attest, under penalty of perjury, that they are in one of the following categories: A U.S. citizen, A U.S. non-citizen national, A lawful permanent resident or An alien authorized to work. Documentation for proof of identity or employment authorization With the form, prospective employees must provide documents that prove their eligibility to work. A variety of documents are acceptable. The prospective employee must provide either: One document that establishes both identity and employment eligibility (on List A on the I-9) One document that establishes identity (on