Client repots that their purchase agreements are sometimes become "not confirmed" any longer and their view is that the POs associated with the PA should therefore become invalidated and incapable of incurring any more cost.

Clearly with POs in flight that may have un-invoiced receipts booked against them any status change to the PO may cause invoicing to fail, so they are looking for some automated status change that would prevent any further expenditure upon the transition from "confirmed" to "not confirmed" on a PA that does allow any material expenditure to occur against the PO.