You need to have the DFG send you a booklet called, "Get Set to Trap". Once you do that, study it and call to see where you can take the Trapper's Test. It is not that tough of a test, but you need to know certain things only California requires (reason for the book). After that you will get a trap number issued to you and then you buy your license. Email me and I will give you info on the California Trappers Association if you are interested.