"As the United States Postal Service (USPS) warned of possible “significant” delays in handling mail-in ballots ahead of the November election, there have been calls for private delivery companies to help manage absentee balloting, an idea both FedEx and UPS have rejected."

"FedEx and UPS told Reuters that, for the most part, private delivery companies cannot legally handle mail-in ballots, making the proposal essentially a non-starter."  

https://www.theepochtimes.com/ups-and-fedex-reject-handling-mail-in-ballots-as-postal-service-warns-of-significant-delays_3462584.html