To amend the Internal Revenue Code of 1986 to reduce tobacco smuggling, and for other purposes.

Smuggled Tobacco Prevention Act of 2011 or the STOP Act - Amends the Internal Revenue Code to restrict the sale, lease, export or import, or delivery of tobacco production machines to persons lawfully engaged in: (1) the sale, lease, export or import, or delivery of such machines; (2) the manufacture or packaging of tobacco products or processed tobacco; or (3) the application of unique...