Uber's new "Return a Package" feature lets users send up to five sealed, labeled, and prepaid packages to a nearby post office, UPS, or FedEx.
Uber will charge a flat fee of $5 or $3 for Uber One members on the Uber and Uber Eats apps in 5,000 cities.
The move is a response to more stringent and shorter time frames for retail package returns.
Uber plans to take advantage of a recent National Retail Federation poll which revealed that 80% of shoppers under 30 find mail returns annoying.
Uber's director of delivery product management Wendy Lee hopes this will be a "huge time saver and convenience play" for U.S. consumers.
After selecting a nearby postal carrier and confirming the pickup, Uber will send a courier to the given address to pick up the package.
Users can track the dropoff in real time through the app and Uber will send an image as confirmation of the dropoff.
To be eligible, packages must cost less than $100 weighing under 30 pounds. Alcohol, highly perishable items, fragile items, and gift cards are prohibited.