What is the right way to reject them? Do I need to send them a formal rejection letter or just an email?Yes. It is absolutely legal for a landlord to refuse to rent to you for no reason. Download a customizable rental application rejection letter template for landlords or property managers to professionally notify applicants. Good evening, BP. I'm writing my Tenant Rejection Letter and found some reasons online as to why a tenant is denied their application. First, clearly state the reason for the appeal of the property's decision and restate their reason for denying your rental application. The best time to send an appeal letter is within a week from receiving the denial letter. Once you've let your future tenant know they've been accepted, you also need to reach out to those who were rejected. However, it is important to be careful not to violate fair housing laws. Also fill out and file an Application to Prevent Forfeiture Due to COVID-19 Rental Debt (form UD-125).