Determine whether a coin is counterfeit by to comparing the coin's size to a verified version. Looking at the metallic texture of coins compared to others also distinguishes between real and fake tender. U.S. Heritage Coins notes taking the coin to a coin dealer is another way of spotting fake coins.
The wear of a coin can also be reproduced and all coins should be examined more closely. Check the font and lettering of a coin paying attention to detail. Weighing the coin also proves fraud. If the coin sounds like plastic when dropped to the floor, then it is a fake piece. Fake coins are usually made from sub-par or ineffective materials that makes it a forgery upon superficial glance.
Another way to detect fraud is the price of a valuable coin. If the price sounds to good to be true, then it is likely a forgery. Usually coin forgers set their sights on manufacturing coins that are rare and expensive in nature, while others do it for hobby. Looking for the word "COPY" on a coin is a sure way of detecting a fake piece. The copy stamp on a fake coin is required under the Hobby Protection Act.