This has been signed in person during a private event. He used a black sharpie. We obtain all of our signatures at various events from stadiums, private signings, hotels, airports, charity events and many more. We have been in business for 20 years working hard to provide you authentic memorabilia as we travel all over the country to various events. Please view our other autographs. THIS GOLF FLAG COMES WITH A CERTIFICATE OF AUTHENTICITY (COA) FROM JAMES SPENCE AUTHENTICATION (JSA). JSA IS THE LEADER IN THIRD PARTY AUTOGRAPH AUTHENTICATION. THIS ITEM WAS HAND SIGNED UNDER OUR SUPERVISION.