Your polite rental application denial letter should clearly state the applicant's name as given on their original submission. This guide will help landlords navigate the rental application denial process and provide a free rental application denial letter template.Download a customizable rental application rejection letter template for landlords or property managers to professionally notify applicants. Comprehensive guide on how to send a rental application denial letter. First, clearly state the reason for the appeal of the property's decision and restate their reason for denying your rental application. Here is an example of a professional yet polite way to deny a rental application. First, clearly state the reason for the appeal of the property's decision and restate their reason for denying your rental application. You'll need to fill out a rental application first. When filling out a rental application, be sure to provide accurate information and fill out the form to the best of your ability. 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.