We want to reject potential tenants with very low credit score and not so solid credit history. Download a customizable rental application rejection letter template for landlords or property managers to professionally notify applicants.The form you need to respond to an eviction case is Answer - Unlawful Detainer-Eviction (form UD-105). 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. Typically, most applications take 25 days (it used to be about 23 days, but now we're seeing it closer to 25 days) for a decision. SCCHA offers free workshops to help you succeed in your search. Learn everything from how the process works to how to fill out a rental application. Good evening, BP. I'm writing my Tenant Rejection Letter and found some reasons online as to why a tenant is denied their application.