Facebook has several features in place to limit the potential for spam and abuse on the site. Verifying your account helps you retain control of your account and applications on Facebook.
There are multiple ways to verify your account. First, you can verify your cell phone, which allows us to verify that a real person is in control of the account. This process is explained at:
http://www.facebook.com/confirmphone.php
The second way to verify your account is to affiliate with a college network. If your school provides you with an email address, you can add a college network from the 'Networks' tab on the Account Settings page, which can be accessed from the 'Settings' drop-down menu at the top of any Facebook page.
Additionally, you can verify your account by adding a valid credit card to your Facebook account.
Unfortunately, if you cannot verify via these methods, you may be unable to verify your account. We apologize for the inconvenience, but this is currently one of the most effective tools we have in place to protect our users and developers.
-Niket Biswas
Facebook Developer Network Team