You can apply for a PIN on the FAFSA on the Web site or you can visit www.pin.ed.gov. A PIN will be mailed to you — or if you put in an e-mail address, it will be sent to your e-mail address. This number confirms your identity with the U.S. Department of Education and allows you to electronically sign your FAFSA application. It also allows you to go in and make changes, request a Student Aid Report (SAR) or fill out a renewal application in subsequent years. This number has replaced a physical signature and makes processing much quicker.