If you want to cancel your Klout account, you can do so by visiting the appropriate opt-out page. if you are using Klout on Twitter, then visit http://klout.com/oauth/optout/twOO; if you are using Klout on Facebook, then visit http://klout.com/oauth/optout/fbOO. Follow the on-screen instructions to cancel your account.
How to Cancel Your Klout Account
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