Tag number needs to match the number on your licence. Each tag has a unique number that must be entered to purchase your licence. If the tag number on your licence doesn't match the tag on the deer, you go to jail. All the fish cop needs to do is check your licence and tag against each other. You need to carry both so he doesn't need to run anything. The system is pretty fool proof but I'm sure some fools will try. I think the system is awesome. It's basically the same as before but now you can buy your licence from home in the comfort of your underwear.