How to remove your Seamless account
It’s a bit complicated to cancel your account, so Seamless gets a grey listing.
From their FAQ (http://www.seamless.com/finedining/learnmore/SWprivacy.html): To expire an account, users should email us at firstname.lastname@example.org.
Helpful Trick: Removing online data
Helpful Trick: Remove third-party logins
If you signed up for Seamless using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Seamless. Click here to find out how.