Expense Management Voids Reversals

Hi Comm

Does anybody know or has handled expense management voucher  voids/ reversals . As I understand it there is nothing to prevent the standard voucher (PV) created by expense management from being voided and this does not translate through to the exp management side that is a  reimbursement approved and created in Exp management. Does anyone have a suggestion on this issue of the voucher revarsals as it seems that exp mgmt has no built in functionality to handle voucher reversals

thanks