This comes with a certificate of authenticity from James Spence Authentication, one of the leading autograph authenticators in the industry. Listing and template services provided by inkFrog. The item "Derrick Thomas Autographed Kansas City Chiefs Mini Helmet NFL Football JSA COA" is in sale since Sunday, December 2, 2018. This item is in the category "Sports Mem, Cards & Fan Shop\Autographs-Original\Football-NFL\Helmets". The seller is "icemanentertainment" and is located in Kansas City, Missouri.This item can be shipped worldwide.