The United States Postal Service addressed question:
“The CDC, the World Health Organization, as well as the Surgeon General have indicated that there is currently no evidence that COVID-19 is being spread through the mail.
“Specifically, according to the World Health Organization, ‘the likelihood of an infected person contaminating commercial goods is low and the risk of catching the virus that causes COVID-19 from a package that has been moved, traveled, and been exposed to different conditions and temperature is also low.’”
But that doesn’t mean that social distancing rules should be ignored. The post office has modified its process with customer signatures during the pandemic:
“While maintaining a safe, appropriate distance, employees will request the customer’s first initial and last name so that the employee can enter the information on the electronic screen or hard copy items. ... For increased safety, employees will politely ask the customer to step back a safe distance or close the screen door/door so that they may leave the item in the mail receptacle or appropriate location by the customer door.”
Delivery services like UPS also have changed protocol:
“UPS’s Signature Required guidelines are temporarily being adjusted such that consignees will no longer need to sign for UPS Signature Required deliveries. Despite this adjusted process the driver will still need to make contact with the consignee. The consignee must, at the time of delivery, acknowledge that UPS is making a delivery and, if applicable, show government issued photo ID.”