The purpose of the Cancel Purchaseorder is to request another business application to make Cancels to an existing Purchase Order. This Cancel must refer to the original document and/or item ordered. The Cancel processing assumes replacement of fields sent, with the exception the identifying fields of the Purchase Order.

If any of these key fields require changing, (i.e. the MoveProduct Document Id or a LineNumber) that constitutes a cancellation of the request and/or the addition of another Purchase Order.