Comprehensive guide on how to send a rental application denial letter. In this article, we'll talk you through what's included in a rental application denial letter and even give you a free template to use.You will be contacted immediately upon determination of approval or denial. We regret to inform you that your application has not been approved for this property at this time. This decision does not reflect upon you. MiamiDade requires associations to act on rental applications within 45 days and state the reason for any rejected application. Applicants must download or pick up and complete a facility rental application packet. Assistance Denial Letter. 1) Completed application form (be sure to sign, notarize and date). Please visit our office or contact us at 305-403-3222 for assistance in completing this form.