CCG is a group of independent companies focused on the impartial, independent, and expert certification and grading of collectibles.
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Numismatic Guaranty Corporation
http://www.ngccoin.com
NGC is the world’s leading and largest third-party grading company. These coins are securely encapsulated within the innovative and industry-leading NGC holder – the same holder rigorously tested and implemented by the Smithsonian to preserve and protect their most valuable coins. Once encapsulated, these coins can be showcased with NGC's Photo Proof and historical documentation. And for coins that may have been adversely affected by storage or the environment, NGC's independent affiliate, Numismatic Conservation Services (NCS), can help bring out a coin’s original beauty and detail while simultaneously prolonging its life. NGC is proud to be the Official Grading Service of both the Professional Numismatists Guild (PNG) and the American Numismatic Association (ANA).

NGC's dominance in coin certification is paralleled by its commitment to numismatic education and resources, including the NGC Registry, which enables collectors to register and display their collections with other collectors, VarietyPlus™, the NGC Coin Encyclopedia, Community Message Boards and free public access to the NumisMedia price guide, the leading independent price guide for the hobby.

Paper Money Guaranty
http://www.pmgnotes.com
The most comprehensive third-party note grading and encapsulation service, PMG provides the highest levels of accuracy, integrity and impartiality, and delivers proven processes and standards for the care and evaluation of paper money. The knowledge, integrity and dedication of PMG's team of grading experts ensure you a level of grading consistency unparalleled in the industry. And PMG's commitment to collecting resources includes the PMG Notes Registry, an online tool that enables collectors to share and display their collections alongside other great collections, and Community Chat Boards that connect collectors together from across the world.

Certified Guaranty Company
http://www.cgccomics.com
Both collectors and dealers alike recognize CGC as the market standard for comic book grading and certification. CGC is committed to promoting the hobby and enhancing the collecting experience through their grading opinions, restoration detection, pedigree attribution. We also make available a host of community resources, including the Comics Registry and Chat Boards, where comic book collectors come together to share their collections and knowledge with each other. CGC submitters also have the security of a high-impact, tamper evident holder that revolutionizes the protection of comic books, while featuring the CGC grade and identification information. And the prestigious CGC Signature Series comic books offer the hobby's only 100% Certified Authentic Signature.