In Montana the seller’s agent is obligated to disclose any adverse material facts that concern the property. An adverse material fact is defined as a fact that should be recognized by a broker or salesperson as being of enough significance as to affect a person’s decision to enter into a contact to buy or sell real property and may be a fact that materially affects the value, affects the structural integrity, or presents a documented health risk. Death is not specifically defined as a material fact, but it can affect the value, so sellers should play on the side of caution and disclose.