Second, use scientific methods to distinguish fake money from fake rust and pseudo color. In the identification of ancient coins, it is a very important method to distinguish the authenticity of copper rust from that of copper color, because it is difficult to absolutely judge the authenticity of some counterfeit coins from the shape of words, and the method of identifying the color of copper rust is relatively simple.
Third, be familiar with the basic characteristics of counterfeit money. To identify counterfeit money, we should not only understand the basic characteristics and individual characteristics of real money in each era, but also understand the basic characteristics of counterfeit money. The face of altered counterfeit money is uneven, the combined counterfeit money has different colors, and there are always traces around the carved words. The coins made by the sand turning method are slightly smaller and thinner than the real money. If you know the basic details and forgery methods of counterfeit money, you can find the forgery of counterfeit money by careful observation.