In your letter, you should politely decline the applicant. We discuss everything you need to know about turning down applicants and provide a template for your convenience.In the letter, express your appreciation for the applicant's interest and politely explain why you declined them. There are plenty of reasons to legally turn down a tenant application for your property. Learn about your rights with Harrisburg Property Management Group. If the landlord did not send an explanation, you may ask why your application was rejected. The Rental Application. The property manager or landlord may ask a prospective renter to fill out a rental application. If a landlord denies a rental housing application, they must provide the applicant with a written notice of denial within 3 business days of the. If you had an incomplete application with not enough references, provide those in the appeal letter.