1. In the sample letter, fill in your personal information. Learn how to fill out a Financial Statement Form, which you need for many types of cases in Massachusetts Probate and Family Court.Download a proof of residency letter template for family members, notarized or non-notarized, tailored for legal use. A 609 letter is a credit repair method that requests credit bureaus to remove erroneous negative entries from your credit report. How to use this sample letter: 1. Read the background below. 2. A 609 letter is a tool that helps you request information about items on your credit report and address errors. After you complete your eligibility application, you may see that you need to send in verification documents, or proof, of information you have submitted. Two sections of the Fair Credit Reporting Act build up the framework on which the 609 dispute letter works. Speak with a licensed attorney before completing and sending this letter.