Download a customizable rental application rejection letter template for landlords or property managers to professionally notify applicants. I never deny anyone.I tell them what must change so I can approve them. You should always act fairly, professionally, and compliantly when rejecting rental applications. Check out our guide below for the best practices. You actually don't have to give him a reason. But a better qualified applicant is always a sufficient reason. Your letter should have a professional and informative tone, covering exactly why you're denying their rental application. Declining to rent to someone for "no reason" is almost always legal. Clear statement of your decision: Communicate that the tenant's application was unsuccessful right at the beginning of the letter.