If the application isn't fully completed, you don't need to give any further reason to reject. A rental application denial letter, also known as an adverse action letter, is a formal document that a landlord or property manager sends to applicants.Download a customizable rental application rejection letter template for landlords or property managers to professionally notify applicants. If you are close to the deadline, use this General Denial packet to file your response. The form you need to respond to an eviction case is Answer - Unlawful Detainer-Eviction (form UD-105). This attachment is meant to provide more information on how a project owner.