1. Montana Child Support Enforcement Division
State agency that establishes paternity, opens child support orders, enforces payments, modifies obligations when income changes, and processes interstate cases for Montana parents. Custodial and non-custodial fathers can open a case online or by phone; bring the other parent's information, income records, and any existing orders. Modification requires a substantial change in circumstances — job loss, new parenting time, or disability.
800-346-5437 · 3075 N Montana Ave, Helena, MT 59620