(CNN) When it comes to robots driving around, navigating the streets and tirelessly delivering packages, who wouldn't be a fan? Well ... New York City, apparently.

FedEx SameDay Bots, six-wheeled, robots which will deliver packages straight to a customer's door, were seen in the city last week.

The delivery robot, called Roxo, is not actually being tested in New York, but was visiting the city for a special event, a FedEx spokesperson told CNN.

Nevertherless, lawyers for the New York City Department of Transportation delivered a cease-and-desist letter to FedEx on Monday, warning that the robots were violating multiple traffic provisions.

"You are hereby directed to immediately cease and desist operating your SameDay Bots on the streets and sidewalks in the City of New York," the letter read.

Read More