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."Sorry, but we will only consider complete applications which must include all occupants and payment of the non-refundable application fee.". In the letter, express your appreciation for the applicant's interest and politely explain why you declined them. Why Do Rental Applications Get Rejected? Why don't you want to go into details of why they are denied?