To cancel an ARIBA purchase order, the preparer who placed the order must contact the supplier. Best practice is to add a Comment to the EI purchase order stating the order is canceled, detailing to whom you spoke, and any other pertinent information.
After canceling the order with the supplier, you must close the purchase order (PO) and remove the open balance from the budget. To close Catalog and Non-Catalog POs, use the Change/Close Order Request Form. For Blanket Purchase Orders (BPO), visit the Closing or Changing Blanket Purchase Orders page and follow the step-by-step instructions on how to close a BPO.