ANACS - A service that renders an opinion on a coin's authenticity and grade. Ancient Coin Certification Service - David R. Sear provides an authoritative aid to collectors and dealers who are seeking both a valid attribution of their coins and confirmation of authenticity. Independent Coin Grading Company - Offering blind submission through a CPA firm to eliminate submission bias. Numismatic Guaranty Corporation of America - Submit most US and world coins for grading through an authorized member/dealer. Sovereign Entities Grading Service, Inc. - Grading and encapsulating service for U.S. coins, errors, and varieties. PCI - Accepts direct submittals from the general public, collectors and dealers. Robert Matthews Coin Authentication - Specialises in the scientific examination and authentication of British milled coins. Professional Coin Grading Service - Includes prices and descriptions of grading and authentication services.