in standard accounting there is only two types of invoices one is cash & other is credit, but in our business dealing we obligated to lunching new strategy for selling as pending sales invoice for payment which we are arrange by this way for following reasons:
1- to avoid accumulation of increased amount gradually for credit invoices at our customers.
2- if we make cash invoices the customers not pay it directly only invoice by invoice.
Thus, we obligated to use pending cash invoice & follow up payment processes through financial reports
Thus, is it your program can be customized this kind of processes