Hello,

UPS Sure Post and FedEx SmartPost are the services that these carriers offer that pick up and move shipments using the UPS/Fedex networks, use their tracking systems, but deliver into the USPS DDU (delivery distribution unit) for what they call last-mile delivery to the recipient. Usually, you need to ship in some volume to access these services but they can save you on shipping, including cutting out the UPS/Fedex residential address upcharges.

I hope this answers your question!

Cheers,
Krista