This Form Assistant gives you a letter to ask your landlord to give your security deposit back. You will receive a refund application form.Proof of payment will be required to process all claims. Learn the basics of how to write a security deposit letter to a tenant. Us and include "Refund Status" in the subject line or call 216-443-7420 to speak with a Quality Assurance representative. Sample Demand Letter for Return of Security Deposit. What to include in a demand letter when your landlord hasn't returned your security deposit. In this article, we'll show you how to write a refund request letter template that not only grabs attention but also persuades companies to act in your favor. Click here to download a copy of this sample letter in PDF format. Date:______. All owners are required to go on direct deposit to receive HAP payments.