Excerpted From : http://www.uscis.gov
New Form I-9 Released
On March 8, 2013, USCIS released a new Employment Eligibility Verification Form I-9. Employers should begin using the new Form I-9 with revision date 03/08/13 immediately for all new hires. The revision date is on the lower left of the new form (Rev. 03/08/13)N. Employers may continue to use previously valid Forms I-9 (Rev. 08/07/09Y and 02/02/09N) for 60 days until May 7, 2013. After 05/07/13, employers must only use the new Form I-9 (Rev. 03/08/13)N. In the cases of reverification or rehires the new version of the Form I-9 (Rev. 03/08/13)N must be used. For more information, please refer to the Federal Register notice. You may obtain the new Form I-9 (Rev.03/08/13)N by visiting I-9 Central or the USCIS website.
Here are some of the changes to the I-9:
Form I-9 is now two pages
New fields for e-mail address, phone number and foreign passport in Section 1.
Employers are required to complete Form I-9 for all newly-hired employees to verify their identity and authorization to work in the United States.