A form of Optional coverage purchased to compensate for the loss of use of property, if it cannot be used because of a loss covered by the policy. This is most ... protecting against loss of rental income. It is particularly valuable where a landlord may depend upon a rental income from his various Building including the land immediately surrounding it and belonging to it. to pay the mortgages. In event of fire, the rents may cease, but his obligation to pay the mortgage may continue.