The invention relates to a self-adhesive or heat-sealable security information medium designed to be applied to a page of a security document and to receive printing andor writing, comprising an adhesive layer and at least one covering layer that covers the adhesive layer, characterized in that the cohesive strength of the covering layer is less than the adhesive strength of the adhesive layer. The system includes a host server interfaced to a plurality of nodes where each node communicates with a number of utility meters. The cover fits over the base to define an interior space for enclosing the appliance, and can be secured to the base in at least two positions.