Download a customizable rental application rejection letter template for landlords or property managers to professionally notify applicants. Your letter should have a professional and informative tone, covering exactly why you're denying their rental application.I am going to be writing the rejection letters and emailing them out tonight. But one tenant keeps calling and texting for updates. Actually yes, it's called an adverse action letter. Any service that allows you to pull someone's credit has a way of sending this letter. 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. Clear statement of your decision: Communicate that the tenant's application was unsuccessful right at the beginning of the letter. I never deny anyone. I tell them what must change so I can approve them.