Simple on-line payments facility

The invention provides a payment interface that is both simple and powerful: one that supports multiple users per customer, with proper roles and financial controls; that hides the details of the underlying payment system(s) and automatically routes payments to the appropriate system; that allows the user to create, save, and schedule groups of payments, where those groups are independent of grouping capabilities of the underlying payment system(s); that provides notification of important events to users and payment recipients; and that automatically processes and takes proper action when it encounters exception conditions.