The autograph was witnessed and authenticated by a Beckett representative as part of their Beckett authentication services. The helmet comes with matching serial numbers on both the Beckett COA and helmet. The helmet also comes with the official GTSM Hologram, GTSM has the exclusive autograph contract with Darnold. Both the Beckett and GTSM Hologram are to guarantee authenticity. This helmet is a must for any Sam Darnold, NY Jets, or NFL Collector.The item "Sam Darnold Autographed New York Jets Chrome Mini Helmet Witness Beckett GTSM" is in sale since Wednesday, July 18, 2018. This item is in the category "Sports Mem, Cards & Fan Shop\Autographs-Original\Football-NFL\Helmets". The seller is "brasilmj" and is located in Santa Clara, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica.