Bring your Montana Driver's License when you come to process the title.
Moving to Montana
Montana Driver's License or proof of residency. Proof of residency:
Property tax statement in the name of the registered owner of vehicle, or,
Current lease or rental agreement from a Montana property owner.
Montana State Law requires people moving to Montana obtain a driver's license within 30 days and registering their vehicle(s) within 60 days.
Bring in the out of state title. If there is more than one (1) name on the out of state title, only one (1) needs to sign documents to title the vehicle.
If the title is held by a lien holder, you will need to bring in a registration to obtain a 40 day permit to drive and a form to send to your lien holder. The form can be obtained from the County Motor Vehicle Office or online https://dojmt.gov/driving/vehicle-title-registration-forms/(Form MV63 - scroll down to find form).