The fafsa.ed.gov PIN was replaced by the FSA ID on May 10, 2015. For those who still have a PIN, your information can be linked when registering for an FSA ID.
The U.S. Department of Education introduced the FSA ID in order to increase security for users by minimizing the number of times that personally identifiable information is entered. When using the Federal Student Aid PIN, users were required to enter their PIN along with their name, social security number and date of birth; however, with the FSA ID, users are only required to enter a username and password. The FSA ID also offers a greater range of convenience and practicality. With the FSA ID, users are able to log in using their e-mail address rather than their username, and can also reset their password via e-mail.