Owning a challenge coin comes with a quiet contract. You're supposed to carry it. That's the entire premise behind a "coin check," and if you're new to it, here's how not to get caught buying a round. Anyone can initiate a check, anywhere, anytime, traditionally by slapping a coin on a bar or table, or holding it up and calling "coin check." Once it's called, every coin holder present has to produce theirs. You get up to three steps away to retrieve your coin if it's not alr