Please feel free to use a PO Box to ship your order. UPS and FedEx do NOT deliver to P.O. Boxes, however. Please make sure to use either Flat Rate or Super Saver Shipping for shipments of this type. The post office cannot accept orders shipped by carriers other than the USPS for P.O. Boxes.
If you provide a PO Box address and select an expedited shipping method at checkout, it will be bumped down to the Flat Rate or Super Saver Shipping during fulfillment. There is no trigger to refund you the difference - we apologize for any inconvenience.