Log in Facebook account that you desire to unsubscribe.
Click account (above on the right) and select account settings.
How To Completely Delete Facebook Account
Click on 'Security' in the column on the left. At the bottom of the right pane, click the link "Disables your account"
In the window that opens, inspect one of the boxes to show the reason you desire to deactivate your account. If let unattended package on the side of not receiving e-mail, will continue to receive invites to events by your buddies, requests to sign up with groups, and so on. Then click the button to confirm,
In the window that opens, enter your password and click on the "Deactivate Now".
And you all set you a message informing you that your account has been shut down. If at some point wish to reactivate it just please, visit utilizing your e-mail address and old password.
Well I hope this Tutorial will help them to unsubscribe or How To Completely Delete Facebook Account.