How you get a certificate of authenticity (COA) for an autograph?
I have a football signed by Peyton Manning, Joseph Addai, Marvin Harrison and 12 other colts team Superbowl last year. I won on ebay for about $ 100 because of the COA but none of the other things I've seen, this ball could be worth much, so I'm eager to know what I must do to get the COA. Thank you very much!
Here are two autograph authenticators most popular. Http: / / www.psadna.com/ http://www.spenceloa.com/
Reggie Harrison of the Pittsburgh Steelers Autograph Event