Besides using a third party authenticator consistently at every game, Major League Baseball allows its fans to trace their memorabilia purchases online by using a unique ID number and hologram.

FORBES: Buyer Beware: The Fragility Of The Sports Memorabilia Industry

Readers may be surprised to learn that it is no longer technically challenging to trace a call, even one with a falsified caller ID (as many Spammers do).

FORBES: Does the 'Do Not Call' List Even Work?