Log in to your Facebook account.
Log in to your account as you normally would. If a thief has hacked your account and changed the password, ignore the next several steps -- just visit the Facebook Security Help section.
Go to the "Settings" tab.
Under the "Settings" tab, click on "Help." It should be in the upper right-hand corner of the screen between your name and the logout link.
Navigate to the "Help Center."
Look for the "Hacked Accounts and Spam" section of the Help Center, and click on that link.
Select the link that best describes the situation.
Read the options, and click on the one that best describes your situation.
Follow the instructions.
Follow Facebook's instructions step-by-step. You may need to change your login, and you should definitely change your password.
Report the Facebook identity theft.
If someone is using your e-mail address to send spam to Facebook friends and anyone else in your address book, send that address to firstname.lastname@example.org. This is the Federal Trade Commission's official e-mail address for reporting all identity theft, including Facebook identity theft.