How to remove your ShutterFly account
Contact customer care: http://shutterfly-2.custhelp.com/app/ask and ask to have your account closed. If they ask for a reason just tell them you want to close the account.
Helpful Trick: Removing online data
Helpful Trick: Remove third-party logins
If you signed up for ShutterFly using a third-party login such as Facebook or Twitter, you probably want to revoke all access from ShutterFly. Click here to find out how.