I am in the process of buying a house and there is a dividing collapsing wall between both houses. The wall is 3 feet tall with stone to contain some soil located in the neighbor's property..According to the seller, the wall belongs to the neighbor. If the wall falls, it will fall into the side of the home that I am planning to buy? Who will be responsible to fix? how can I really check that that wall belongs to him and not me?