A remote client terminal sends a request for a resource controlled by a host. The host responds by providing a reference to a policy discovery script. The policy discovery script controls the client terminal to make a test resource request to a policy service domain. A policy service executes a policy decision for the test resource request in accordance with any policy existent for the remote client terminal. The policy service transmits an indication of any deny decision to the remote client terminal. The policy discovery script processes the indication of the deny decision to output an indication of policy existent for the remote client terminal. The indication of existent policy can be outputted to the host, to a user agent at the client terminal, or to the user, so as to facilitate content modification or replacement or to inform the user of the policy.