Returned Requisition with Approved PO. Business don't expect it to have Receipts or Payments, how to

Dear All,

In our system, all cancelled Requisition with Approved PO don't have receipts or invoice. But for returned requisition with Approved PO, some of them have receipts and invoice while some don't have. We would like to know how to resolve PR/PO contradictory status. If PR is returned, how do we make a PO on hold/cancelled so that if PR is revised or PO is revised, we can be clear on the final status whether the PO is finally issue to vendor or not?

Best Regards,

Mark Kennon Perez