Operation Bullpen: Be aware of these authenticators and autograph
Autographs - News and Notes
Operation Bullpen: Be aware of these authenticators and autograph
Phony Autograph Authenticators and Fake COAs Mar Collecting Hobby
Operation Bullpen: Unraveling the Sports Memorabilia Forgery Ring
Can Anyone Help Verify This? : r/Autographs
Fraud is 'rampant' in sports collectibles. Here's how the industry
Forgery: The bane of the hobby of sports collectors - Sports
Operation Bullpen Author Shares Some of the Tricks of the Trade of
Authenticity: 5 Tips For Autograph Buyers –
Authenticity: 5 Tips For Autograph Buyers –
operation bullpen: the biggest forgery scam in american history
Operation Bullpen Bullpen & More, by Kevin Nelson
Operation Bullpen Author Pens Online Series for SCD On the Craft
MLB making genuine effort to fight counterfeiting - The Boston Globe
The Biggest Players in Sports Memorabilia Counterfeit