See the following example. The following example illustrates how to complete lines 1 through 6 of Arizona Form 309.1. In the sample letter, fill in your personal information. "Generate a free Debt Validation Letter to ascertain the legitimacy of your debt. Not sure if you owe? Below is a sample letter to help you craft your own letter. Send the letter via certified mail and keep the return receipt for your records. An individual who is filing an individual income tax form. 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.