Requesting changes to a Purchase Order You can request changes to purchase orders when changes are needed to fulfill an order. You can make changes during and after acknowledgment. If the PO requires acknowledgement, you will submit the changes within the acknowledgement process (via Acknowledge button). POs that don't require acknowledgement (Open status) and that have already been accepted can have changes requested by clicking on the Request Changes button. You can request the following changes alone or combined: promise date price quantity split shipment dates and supplier part number. Refer to the iSupplier Portal Invoice Quick Guide (Word, 307 KB)