ASM, the renowned provider of autograph authentication services, was established in 1998 to combat the proliferation of counterfeit, forged, and pirated signed collectibles. ASM's innovative grading system has revolutionized the way in which collectibles are valued, traded, and enjoyed, and its four-tier authentication process has greatly enhanced the hobby of autograph and memorabilia collecting. Over the years, ASM has authenticated countless autographs and collectibles from the realms of sports, music, entertainment, politics, and history, including some of the most valuable specimens in existence.