The invention concerns methods for use in a multiparty accounts receivable and accounts payable system that allow business trading partners to use a single, shared system for both accounts receivable and accounts payable management. A system implementing the methods of the invention forms an electronic "bridge" between a plurality of business trading partners for purposes of invoicing, dispute resolution, financing, and settlement of single and multiple currency debts. As the invoicing and settlement activities of the participants in the methods of the invention are funneled through a common system, the methods allows a participant to aggregate all debts owed to other participants, aggregate all debts owed by the other participants, and net debts owed to other participants with debts owed by these participants. After aggregation and netting steps, the methods of the present invention allow a participant to issue a single payment to settle numerous accounts payable items, and to receive a single payment that settles numerous accounts receivable items. The methods allow participants to use the substantial amount of financial and cash flow information captured by a system implementing the methods of the invention to borrow more efficiently by permitting lenders to view this information. Furthermore, the methods provide a confirmation process to convert existing debt obligations into a new, independent payment obligation due on a date certain and free of any defenses to the underlying contract. The confirmed debt obligations provide a better source of working capital for the participants, or can be converted into electronic promissory notes. The invention further provides methods for electronic exchange of electronic promissory notes, allowing participants to raise working capital in various ways, for example, by selling them.