Florida Free Refund Demand Letter Template. Use our free Refund Demand Letter template to request the return of a payment.A demand letter is a document you give to the person or entity you think owes you money. In it, you explain why you are entitled to the payment and demand it. Demand Letter Templates (22) – with Samples. The ideal demand letter should be brief, firm, to the point, and clear in your request. Explain what you want. Why do you deserve it? Find out how to write a demand letter for money owed. Explore its benefits, essential elements, and use our free template for guidance.