Here is an interesting video on fake coins. It seems to be limited to Silver Morgan Dollar Coins.
Groovygirl buys the most recent year available of uncirculated Silver American Eagles or Canadian Maple one oz. coins. This helps avoid fakes and prove to your future buyer down the road that your coins are not fakes. However, if you can’t find new and uncirculated, buy any American Eagle.
The threat of fake silver coins is not a reason not to buy silver. It is a reason to be educated.