An Early Payment Discount (EPD) mechanism that enables customers to automatically receive an early payment discount for paying their invoice electronically, e.g., via electronic funds transfer (EFT), through an e-Billing system within a designated number of days from on-line invoice post date....http://www.google.de/patents/US8121894?utm_source=gb-gplus-sharePatent US8121894 - Early-payment discount for e-billing system
