The reason i can guarantee this to you is that i obtain all my autographs in person by myself here in NYC. All my items will also pass any authentication tests. If you have any questions please feel free to contact me anytime. I aim to please my customers and look forward to doing business with you.This item is in the category "Sports Mem, Cards & Fan Shop\Autographs-Original\Golf-PGA\Photos". The seller is "sportsave" and is located in this country: US. This item can be shipped worldwide.