Numismatic certification is the process of evaluating and authenticating coins, paper money, and other forms of currency by professional grading services. These services assess the condition, authenticity, and overall quality of the items, assigning them a grade that reflects their value in the market. This certification helps collectors and investors make informed decisions when buying or selling currency. The most recognized grading services, such as the Professional Coin Grading Service (PCGS) and the Numismatic Guaranty Corporation (NGC), provide encapsulation for certified items. This encapsulation protects the currency while displaying its grade, making it easier for collectors to verify its quality and authenticity.