A liquid filter assembly includes a porous tubular support member and a filter element removably and replaceably oriented in the interior volume of the support member. In embodiments, a Notification Generation unit generates a notification message, the notification message including notification event description and related broadcast content identifiers. The acid generator is a specific sulfonium salt compound. If the request is not from an authorized individual, at least one message-based handshake through which one or more relationships of the new group may be activated is performed.