Stones Used To Fake Own Autographs
So you have that famous ticket to that favorite Rolling Stones Concert. And it's autographed. Or that tee shirt, or poster, or picture, or even a concert poster that is signed by one or all of the Rolling Stones. And you're saying to your self " I'm going to sell this on E-Bay and make a bundle. Well hold on there memorabilia guy. That famous (and to you priceless) autograph could be a fake. Yep phony, bogus, not real. According to the band any way. “We all learned to sign each others’ signatures – except for Charlie. He wouldn’t sign anything. But me, Keith, Mick and Brian could all sign each others’ autographs.
“When I see them for sale, I know two of them are not originals. But it was the only way to do it, because you couldn’t pass this stuff around. You didn’t have time; you were on stage in ten minutes.” http://www.classicrockmagazine.com/news/rolling-stones-used-to-fake-own-autographs-bill-wyman/
But don't freak out and throw that autograph away. If it means something to you as a piece of rock history that's all that matters.