If you were living on the premises with the landlord's knowledge and permission, and paid rent - you were a tenant. If the landlord "forgot" to inform the insurance company about renting part of the house to a tenant, the insurer can refuse to cover the damages. It would make your case harder, but will not defeat it: you are seeking compensation from the landlord, regardless of his insurance coverage.
Answered on Apr 02nd, 2015 at 7:32 PM