Property Assessment Visits MONTANA DEPARTMENT OF REVENUE Montana Department of Revenue property appraisers may visit your property to conduct an on-site review for property appraisal purposes. Please notify your local DOR office in writing if you wish to be present. DOR appraisers are legally authorized to enter private property. Threatening, violent, or intimidating behavior towards appraisers may result in criminal prosecution. For more information contact your local DOR office, visit MTRevenue.gov, or call (406) 444-6900. Property Assessment Visits MONTANA DEPARTMENT OF REVENUE Montana Department of Revenue property appraisers may visit your property to conduct an on - site review for property appraisal purposes . Please notify your local DOR office in writing if you wish to be present . DOR appraisers are legally authorized to enter private property . Threatening , violent , or intimidating behavior towards appraisers may result in criminal prosecution . For more information contact your local DOR office , visit MTRevenue.gov , or call ( 406 ) 444-6900 .