Your letter should have a professional and informative tone, covering exactly why you're denying their rental application. How do I refuse a rental application in California?Throw it away and go somewhere else. Download a customizable rental application rejection letter template for landlords or property managers to professionally notify applicants. A rental application denial letter, also known as an adverse action letter, is a formal document that a landlord or property manager sends to applicants. Download our free rental application denial letter to use for your rental business. Find your next tenant with Avail tenant screening. You need to accept the FIRST applicant that was approved or you could be facing fair housing issues. You should always act fairly, professionally, and compliantly when rejecting rental applications. Check out our guide below for the best practices.