Follow these simple steps:
Step1: Log in into the facebook account which you want to delete.
Step2: When you are logged in copy the following link and paste in your browser
www.facebook.com/
help/contact.php?show_
form=delete_account
Step3: After you enter this link you will have the final option to confirm whether to delete your account or not. Click confirm for deleting.
Note: The account will be deleted within 14 days of this click. None of your identity will remain and you can’t log in again with this account.
