By A Mystery Man Writer
Autographs - News and Notes
FBI — Operation Bullpen Slam Dunks Sports/Celebrity Memorabilia Fraud
Book Operation Bullpen Inside Story Biggest Forgery Scam Nelson
Director of 'The Counterfeiter' revisits Operation Bullpen
FOX19 Investigates: Autographed Memorabilia
Neil Armstrong Autograph Study — Zarelli Space Authentication
How MLB Authenticates Balls Like Aaron Judge's 60th Homer - The New York Times
MLB authentication program
Operation Bullpen: Be aware of these authenticators and autograph
Babe Ruth Baseballs — FBI
Forgery: The bane of the hobby of sports collectors - Sports
Book Operation Bullpen Inside Story Biggest Forgery Scam Nelson
Go Behind the Scenes of MLB Authentication - Sports Collectors Digest
Forgery: The bane of the hobby of sports collectors - Sports Collectors Digest
Operation Bullpen: Be aware of these authenticators and autograph