Errors and varieties are classified by three divisions to help define when and how they occur. Listed below are the three divisions. Choose which you think applies to your error or variety coin by clicking the link or image, or use the search feature. Also it is very important to learn the coin minting process before looking for mint errors so check out our guide Coin Minting Process
The Planchet Division errors happen when the alloy is being mixed and during and just after the creation of the planchet, but before the coin is struck by the working dies.
The Die Division occurs during the creation of the die or during the use of the die as it breaks down and begins to crack apart.
The Striking Division is mint errors that occur during the strike and can sometimes be dramatic.