Security Deposit Demand Letter – For a tenant requesting to get back their security deposit. Sample. Download: PDF, MS Word, ODT.If you do not get your deposit back after 30 days, you can send the landlord a special note, called a Tenant's Notice to Provide Deposit Disposition. Learn how to write a security deposit return letter and protect yourself and your tenant. Learn the basics of how to write a security deposit letter to a tenant. Fill out Letter from Landlord to Tenant Returning security deposit less deductions - Utah online. Document the return of a security deposit. However, you can send it electronically as a backup. How do I write a letter to return my security deposit? Utah Code Sections 57173 et seq.