If a tenant never signed a rental agreement and has refused to pay?
My mother , myself , and others close to me have owned many rental properties in several U.S. states . Tenancy regulations vary widely from place to place . Generally speaking if a person is not named on the lease they have no legal right to live at that residence. They can be considered squatters or vagrants in some areas and forceably removed with a call to the local police or sheriffs office. Check the laws in your area . Most areas that enforce leases have very specific rules and they are well publicized . Check the web or local library .