The service provider must designate an agent to receive such notices and, upon receiving notice, must act expeditiously to remove or to cut off access to the material in question; however, it is not generally liable to any other party if it acts in good faith in thus taking the material down. The end-user posting the material, that is, the subscriber whom the service must notify of the copyright owner's notice and the take down, may in turn serve a counter-notification on the service, demanding that the material be restored to the system.