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. Below is a sample, fillintheblank letter that you can use as a guide for disputing a debt with a collector. Get paid faster with these 11 effective email templates for collecting your accounts receivable. Streamline your collections process today! Debt collectors should send you a debt validation letter you can use to verify unpaid dues. 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. How to use this sample letter: 1. Read the background below. 2.