Hello, I need advice. Back in 1999, during the short season, there were several big events in Los Angeles where players showed up for signing in order to promote the NBA.

Well, I fell in line early one morning they started passing out tickets where only a select number could have autographs.
I got a ticket and had Kobe Bryant sign my indoor /outdoor ball. I would like to know where I can send this to to have authenticated. And how much?

By the way, I pulled a 50% off form UD store and purchased a UD pro ball signed by Kobe, so I eventually want to sell my personal signed ball.

Any assistance would help.