Hi Gary
Before anyone can offer advice, there are a number of questions you need to answer:
1) Was the PO receipted as a Delivery Note or as an Invoice?
2) Were the items sundry items or inventory items?
3) Were there any pro-rated miscellaneous charges on the receipt?
4) If inventory, are the items still on hand or have they been sold or assembled?
5) How many items are we talking about?
6) Do you need to correct PO history, or is it good enough to correct Inventory/Payables/Ledger?
Steve