About Us


Founded in 1999, Certified Guaranty Company (CGC) is the first independent, impartial, third-party grading service in magazines, photographs and comics. CGC is a member of the Certified Collectibles Group (CCG), an umbrella organization that includes fellow companies Numismatic Guaranty Corporation (NGC), the leading grading service in rare coins, and Paper Money Guaranty (PMG), the leading currency certification service.

All CCG certification companies are committed to grading collectibles with integrity, accuracy, consistency and impartiality. With this proven model of success, CGC is suited to take on the unique challenges of grading magazines and magazine collections.

A Commitment to Hobby Enrichment

Our commitment is to enhance the collecting experience of a growing number of magazine collectors for decades to come. To accomplish this, CGC will work diligently toward these goals:

To build trust... by increasing the confidence of magazine collectors and new market participants.

To build interest... in the collecting public through education and resource development. By expanding hobby knowledge, we encourage magazine collectors of all levels to explore the hobby and increase their expertise.

To build consensus... around a CGC grading standard based on market-wide research and input from magazine collectors and dealers nationwide.

To build transparency... by revealing the unique characteristics of each magazine we grade, so collectors are better informed about the magazines they buy.

To build a better market... to provide buyers and sellers with professionally and accurately graded magazines, so they can buy and sell with confidence.