A demand letter is a letter you can send to try to resolve a dispute before going to court. Demand letters are often sent in cases where someone owes money.I see from your return policy that I am eligible to receive the full refund. You should provide a reason on the envelope indicating why it needs be returned to the sender. This could be refused, not at this address, etc. Explore how to write a demand letter to demand the return of property. Discover essential components, legal tips, and get a free template. Use firm but polite language. In this article, we discuss how to write a demand letter, what to include in a demand letter, and provide a Texas demand letter template. Create your own return and refund policy using our sample return policy templates and examples.