NGC and PMG have been named the Official Grading Services of the Macau Numismatic Society (MNS). NCS, an affiliate of NGC and PMG, has been named the Official Conservation Service of the MNS.
The MNS was established in 1988 to serve the coin and paper money collecting communities in Macau, a Special Administrative Region of China, and the surrounding areas. The MNS conducts an annual convention, hosts educational forums and regularly publishes new research on coin and paper money.
NGC was founded in 1987 to provide expert and unbiased certification services for coins, tokens and medals. In 2005, PMG was formed to provide similar certification services for paper money. NGC and PMG, along with NCS—a professional coin conservation service—are independent members of the Certified Collectibles Group (CCG).