FedEx SmartPost is a newer service offered by FedEx that is offered in conjunction with USPS.  FedEx SmartPost requires a service contract. To sign up for FedEx SmartPost, contact your FedEx account executive. FedEx SmartPost helps you consolidate and deliver high volumes of low-weight, less time-sensitive business-to-consumer packages using the United States Postal Service (USPS) for final delivery to residences. This service provides delivery Monday through Saturday to all residential addresses in the U.S., including P.O. boxes and military APO and FPO destinations.

  • FedEx SmartPost is available for shipments originating in the 48 contiguous United States only. Alaska, Hawaii, Puerto Rico, and the U.S. territories are not included as origin points.
  • The FedEx SmartPost service allows delivery to all 50 United States and the U.S. territories.
  • FedEx SmartPost supports customer packaging only. Because FedEx SmartPost employs the USPS for final delivery to residences, packages are subject to USPS restrictions.
  • Future day shipping is available for FedEx SmartPost shipments where FedEx Ground® is designated as the pickup carrier.
  • A FedEx SmartPost multiple-package shipment (MPS) works the same as a FedEx Express® Domestic MPS except that there is no master/child tracking number relationship for FedEx SmartPost MPS.
  • Saturday delivery is possible by USPS. No FedEx surcharge applies in this case.
  • Packages can only be tracked using the Delivery Confirmation Number (DCN) assigned to each FedEx SmartPost package. 

For more detailed information about FedEx SmartPost shipping, see FedEx SmartPost. This link also provides the list of FedEx SmartPost Hub cities and associated FedEx HubIDs.

If not set up correctly, when shipping via OrderCup, you will see this error

"Fed Ex error #541 Account Number is either missing or invalid".

To rectify this problem, you will need to contact FedEx to make sure that SmartPost is enabled on your account and that you are using the right HubID as well.