What do you include in a debt collection letter? This guide equips you with the strategies needed to enhance debt recovery efforts and safeguard your business's financial stability.In this article, readers will find a comprehensive example collection letter sample designed to maximize response rates and ensure clarity. A demand letter typically includes specific details about the debt, such as the invoice number, the amount owed, and the due date. The sample letter below will help you to get details on the following: • Why a debt collector thinks you owe this debt. We have compiled some past due accounts receivable collection letter templates for your reference. Keep reading to know more about them. And you recognize that when a demand letter comes from an attorney, it is typically taken more seriously and has a higher rate of success. Use this letter to ask a customer to pay the money that they owe you. Put your business letterhead at the top of the letter.