Temporary vehicle registration, or "temp tags" allows people to legally drive a vehicle that has not yet been registered with the Department of Motor Vehicles (DMV).
Temp tags are often used by people who have recently purchased a vehicle, but have not yet had the opportunity to complete the registration process.
They are also useful for out-of-state residents who need to drive in a different state for a short period of time. Additionally, some states require vehicles to have temp tags displayed when they are being transported from the dealership to the owner's home.
Temp tags are typically issued by a dealership or a DMV office and are valid for a short period of time - in Montana, they are valid for 40 days.