Give your landlord written notice explaining that you intend to withhold rent if the landlord does not begin making repairs within 7 days, and specify the material noncompliance (example: for a category ‘1’ violation) for which the landlord is at fault. Notify your landlord, apartment manager, or rent collector, in person or by registered mail and keep a copy for yourself. mail and keep a copy for yourself. mail Th e defense of non-compliance with FL S. can be raised by the tenant if seven days have elapsed after the delivery of written.