The CLVF is a list at your monitoring central station showing those persons with authorized use of your alarm system and their corresponding passwords, as well as those individuals/organizations that should be contacted in the event of an alarm and their corresponding telephone numbers. You can request a CLVF from our office at any time by calling 781-321-9551, emailing us at monitoring@centralsignal.com, or via mail to Central Signal Corporation, 607 North Ave Bldg 18 Fl 2, Wakefield, MA 01880-1322.