We too use ARC. The pack slips have the order number on them so that you can match up the order numbers. When we get orders for the convalescent plasma, we order the plasma and on the order printout, we note the patient name, then once the plasma arrives, we match up the pack list with the order printout. In the meantime, we keep all the orders and their respective printouts on our metallic white board, that is basically the only way that we have found to somewhat keep abreast of the orders.