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) includes seven of the world’s leading expert services companies for coins, paper money, comic books, stamps and other collectibles. They are Numismatic Guaranty Corporation (NGC), Numismatic Conservation Services (NCS), Paper Money Guaranty (PMG), Certified Guaranty Company (CGC), Classic Collectible Services (CCS), Authenticated Stamp Guaranty (ASG) and Collectibles Authentication Guaranty (CAG). Headquartered in Sarasota, Florida, CCG has locations in China, Germany, India, Japan, Malaysia, the Netherlands, Singapore, South Korea, Thailand and the United Kingdom.

NGC is the world’s leading and largest third-party coin grading service, and its affiliate NCS was the first professional coin conservation company. PMG was founded in 2005 and is by far the world’s largest third-party paper money grading service. CGC set the standard for third-party comic book, magazine, concert poster, lobby card and vintage photograph grading, 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, the newest member of CCG, preserves the authenticity and provenance of collectibles, memorabilia and estate items at the source.

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.