Abstract: The frangible card with a sealed compartment has a top sheet and a bottom sheet made from a synthetic, polymeric, plastic material, both sheets being substantially rigid and being sized and shaped substantially in the form of a conventional credit card, and thus being adapted for transport on or about the person in a wallet or billfold. An information storage medium, such as paper, film, or magnetic storage media, is interleaved between the top and bottom sheets. The top and bottom sheets are sealed around their periphery, preferably by ultrasonic welding, defining a sealed compartment. The top and bottom sheets are opaque in order to preserve the information stored in the sealed compartment in privacy. The top and bottom sheets are scored along one edge, so that access to the compartment is gained by breaking the card along the scored edge. Paper money or other flat valuables may be stored in the compartment with the information storage medium.