From Facebook Developer Wiki

Description

Displays the enclosed content only if Facebook has verified the current user. You should use this tag with fb:else to provide alternate content in case Facebook has not verified the user.

Important

• You may never disclose a user's verified state anywhere in your application or on Facebook, whether to that user or the user's friends.
• You should use this tag to gate elements in your application that already are privacy-controlled. Do not use this tag to gate content like rendered user data, as a savvy user can view the source and see what's hidden.

Examples

See Also

• users.isVerified
• fb:else