How to remove your Social Number account
Be logged in. Right top, hold your mouse pointer over your username (number). Click Account Settings. At the bottom of the page there is a link: Cancel Account. Use it. Another good part: all info of/about you will be erased. Well done Social Number.
Direct removal link: https://socialnumber.com/user/
Helpful Trick: Removing online data
Publicly visible text/images often aren’t properly removed even when you succeed in removing an account. Try editing or removing them manually before removing the account itself. If you’re unsure what happens to your tracks: this can be found mostly in the Terms of Service/Privacy Policy; otherwise you can always contact Social Number and ask personally. By the way, removal requests don’t necessarily mean your data will actually be removed (e.g. due to legal obligations).
Helpful Trick: Remove third-party logins
If you signed up for Social Number using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Social Number. Click here to find out how.