Don't know about Wyoming, but in Utah people mostly cheat by hauling in coyotes from "wherever" they were killed, to collect on bounty money for coyotes that are "supposed" to be killed in the county paying the bounty.
The fur is worth a lot more than the $20 bounty these days, but I kind of doubt the guys who would cheat on a bounty would go to the trouble of putting up fur.
- DAA