You should always act fairly, professionally, and compliantly when rejecting rental applications. Check out our guide below for the best practices.If a landlord denies your application, they're required to tell you why in writing. This is called a "notice of adverse action." Your letter should have a professional and informative tone, covering exactly why you're denying their rental application. Download a customizable rental application rejection letter template for landlords or property managers to professionally notify applicants. The landlord must give you a written notice stating their reasons for denying your application. A tenant cannot be rejected simply because of their race, creed or colour. A tenant can be rejected for the following: poor credit; no credit. Ask the court for an order that stops these companies from using the eviction record.