Holograms used from 2001 to 2005:
In this period, Deloitte & Touche was solely responsible for the authentication of all items authenticated under the auspices of the MLB Authentication Program.
In order to ensure the security of items authenticated under the MLB Authentication Program, holograms are designed to show traces of tampering if a hologram is removed.
In addition to the holograms featured on authenticated memorabilia, different holograms are produced by OpSec, U.S. for use on Major League Baseball Properties licensed products. These holograms, also with unique alphanumeric combinations, allow fans to easily identify merchandise as officially licensed by MLBP. These holograms are NOT used for the authentication of game-used or autographed products and, therefore, will not show up on the verification system located on MLB.com/authentication.