Enter your email adddress:
Enter 5-character passcode:
To get the passcode, enter the email address that you are trying to unsubscribe (use all lower case letters), and leave
the passcode box blank.   Then click on
the Enter button. The 5-character passcode will be instantly sent to you via email.
Return to this screen and enter your email address and the passcode you received.  
The passcode is used to verify your identity.
Please note:  
Your email address will only be used to email you a passcode, then it will be erased. It will
not be used for any other purpose.