What information should be included in my paidinfull letter? Have you recently settled a debt and are searching for a paid in full letter?Good news, we've got two free sample form letters below. If you send a paid in full letter to your creditor or debt collection agency, it informs them that you're making your final payment. Download English and translated versions of Debt Collection Rule model form. Writing a debt collection letter can be difficult. What should you say? Today's Date: Collector's Name: Collector's Address : RE: Account of. Fill in your information on the template letter and edit it as needed to fit your situation. 3. Print and mail the letter.