How to permanently delete a Facebook account.
Step 1: Log in your Facebook account, and then click on this link: https://www.facebook.com/help/delete_account?rdrhc to delete your account.
Step 2: Choose “Delete My Account”.
Step 3: Enter your password in “Password” box. Then enter captcha in under “Tex in the box”. Then click “OK” to finish.
Notice: Within 14 days, if you do not log in again your account, it will be deleted permanently. During that period, you are able to log it in and your Facebook account will be activated as normally.