About Us

The Certified Collectibles Group (CCG) is a set of independent third-party companies focused on the expert authentication, grading and conservation of collectibles.

The Certified Collectibles Group (CCG) is the world’s leading provider of expert, impartial and tech-enabled services that add value and liquidity to collectibles. The CCG companies include Numismatic Guaranty Company (NGC), Paper Money Guaranty (PMG), Certified Guaranty Company (CGC), Classic Collectible Services (CCS), Certified Sports Guaranty (CSG), Authenticated Stamp Guaranty (ASG) and Collectibles Authentication Guaranty (CAG). Since 1987, the CCG companies have certified nearly 75 million coins, banknotes, comic books, video games, trading cards, sports cards, stamps, estate items and related collectibles. Today, CCG serves the world of collectibles online and at its offices in the United States, United Kingdom, Germany and China.

NGC is the world’s leading and largest third-party coin grading service, and its affiliate NCS is the first and foremost professional coin conservation company. PMG was founded in 2005 and is by far the world’s largest third-party paper money grading service. CGC is the preferred grading service for the certification of pop culture collectibles, including comic books, trading cards, magazines and concert posters, and its affiliate CCS performs expert pressing, restoration and restoration removal services for comic books. ASG, a third-party stamp grading service, was founded in 2017. CAG preserves the authenticity and provenance of collectibles, memorabilia and estate items at the source. The latest company to be formed by CCG is CSG, a certification service for sports cards, that was quickly embraced by collectors based on its world-class expertise, advanced technology and operational excellence.

These services share a common approach that is rooted in complete independence and objectivity. CCG companies do not buy or sell collectibles, and their full-time graders are prohibited from commercial trading to prevent conflicts of interest. In addition, a submitter’s identity is always concealed from the experts who handle their submission. These measures ensure a fully impartial expert opinion. Those who submit collectibles to a CCG member company can count on the integrity, expertise and reliability of a proven process. The services provided by CCG member companies add transparency to the market and give greater confidence to buyers and sellers around the world.