If you have them, bring the latest property-tax notice, lien or mortgage statement, creditor or court case number, parcel information, and any tax or foreclosure notice. The property address is enough to start; call even if the paperwork is incomplete.
The creditor or county office named on a notice confirms its own current balance and payoff or release instructions. The title company checks recorded property claims and works with the relevant parties on the documents and figures needed for closing.
Missoula County's property-records page helps with deed and land-record questions. The County's delinquent-tax page is the route for property-tax account questions.