Re-accepting the Terms of Service

Is this for an sso community that is configured to require terms of service be accepted the first time they are signed into the community via SSO (when their sso account is created)?  If so, you should be able to reset their terms of service back to an un-accepted state by passing the user.accept_terms_of_service parameter set to false in the sso token.

The only place that users accept the terms and conditions on a community that uses Lithium-hosted registration is on the user registration page and we don't currently have a mechanism that sends Lithium-hosted users to a page that makes them accept the terms and conditions after they register.  

You could work with Professional Services to build a customization that always sends users to a page to accept terms and conditions after registration if it has not been set.  

If you'd like to see this in the core Lithium product, I would recommend you create an Idea on the Lithosphere idea board (http://lithosphere.lithium.com/t5/Ideas/idb-p/Lithium_Ideas)