We discuss everything you need to know about turning down applicants and provide a template for your convenience. Your letter should have a professional and informative tone, covering exactly why you're denying their rental application.Under federal law, a landlord who denies your tenant application because of information in a tenant screening report is required to inform you of that fact. If you email or write a letter, keep it clear, concise, and professional. Don't complain or criticize the landlord's decision. Download a customizable rental application rejection letter template for landlords or property managers to professionally notify applicants.