Your letter should have a professional and informative tone, covering exactly why you're denying their rental application. 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.We're reviewing why you might deny an applicant, when you can't deny one, and how to legally handle rental application rejections. This guide will help landlords navigate the rental application denial process and provide a free rental application denial letter template. You can ask, but they don't have to answer. They also don't have to be truthful, as admitting to discrimination of any kind is admission of an illegal action.