Our ustomers pay first based on a quotation/order done in OE. We capture the receipt as a prepayment. We thn generate an invoice then match it to a prepayment later. This has become so cumbersome that sometimes we miss to do invoices and we have a lot of outstading prepayments. Is there a way or thirdparty software where we can automaticaly generate an invoice when we recieve payment from a customer? Where we allocate a receipt to a orde/Quotation  that will automaticaly turn to an invoice and automaticaly apply to that receipt.