The Coin Look - Counterfeit Detection - MainUnfortunately, there are many counterfeit coins on the market. Counterfeiting has been going on since the creation of money, since roughly 600 B.C.
Counterfeiters then and today do it to spend the money, but some of the current counterfeiters do it to profit from the numismatic value.
There are two main ways to counterfeit a coin.
The first is to modify an existing coin by adding or removing a mint mark, or tooling the the date to make it look like something else.
The second is to "mint" your own coin... which has been happening a lot by chinese counterfeiters.
In the links below, you will find information on some of the most counterfeited coins.