In the Tech tips section of this site, you will see a VIN section. It is stated there, that many trucks had the VIN screwed to the door post. My truck is that way. They used hex head clutch screws. It has been discussed here many times. Some stated must be a real pain to deal with. In MN there are no inspections of any kind on cars and pickups unless the vehicle was rebuilt from a totaled or wreck. They look for stolen parts is all.