"Unfortunately, I'm going to have to deny your request. Download our free rental application denial letter to use for your rental business.Find your next tenant with Avail tenant screening. You will either need to clean up your credit, post an additional security deposit or obtain a co-signer. "Sorry, but we will only consider complete applications which must include all occupants and payment of the non-refundable application fee.". 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.