It is often difficult to reliably monitor contract performance and receive timely information as to whether a party is actually going to carry out their contractual obligations. Accordingly the invention provides an apparatus and methods for communicating the changes in states of the contractual commitments...http://www.google.de/patents/US7149725?utm_source=gb-gplus-sharePatent US7149725 - Apparatus and method of communicating changes in states of contractual responsibilities
