Disclosed is a metal-clad laminate product having a carrier film, a aqueous soluble release or parting layer deposited onto the carrier film and which can be mechanically separated from the carrier film, and an ultra thin metal layer deposited onto the parting layer. The covert feature is a predefined shape of the flakes, optionally complemented by indicia. Classification of the incoming calls may be accomplished by categorizing calls into groups based on characteristics of the calls.