The letter should state whether the deposit is being returned in full, partially returned, or not returned at all. This program will help you write a demand letter asking your landlord to return a security deposit.Learn the basics of how to write a security deposit letter to a tenant. Here's everything you need to know about not returning security deposits, including a security deposit refund letter template. This form must be filled out completely and legibly, or the refund request will be denied. Reason for Refund: Clearly explain why you are requesting a refund. Fill out a DVD request form. DVD Duplication Form. 6. The registration fee is non-refundable. Contra Costa Water District.