What does the warning mean?

In Idaho, an out of state car you either trailer it down to DMV, where one of the ladies comes out, "I get up on the trailer" and READ her the VIN while she looks at the title LOL, or else you call the local sheriff and they send a deputy who fills out a form documenting the VIN

Idaho is somewhat tough on titles. I have no idea what you do if you are so stupid as to buy a car without paperwork