Social Security Number (SSN)

"Social Security Number (SSN)" submitted by SchoolGrantsfor Editorial Team and last updated on Thursday 21st July 2011

Social Security number (SSN) is nine-digit number issued to U.S. citizens, permanent residents, and temporary (working) residents by the U.S. government’s Social Security Administration. You must have a valid Social Security number (SSN).

You must comply with Selective Service registration. If you’re a male aged 18 through 25 and you have not registered you can, at the same time you complete your FAFSA, give the Selective Service System permission to register you by means of the FAFSA. If you don’t have an SSN, you can find out more about applying for one at or by calling 1-800-772-1213. TTY users can call 1-800-325-0778.

Safeguard your Social Security number at all times. You generally have to provide it to your employer or your bank, but if a business wants it, ask why it’s needed and how it will be used before you give it out. There probably is no legitimate reason for any business to need your Social Security number. Never give it or your driver’s license number to anyone who calls you on the phone or contacts you online saying they need this information to verify your identity.