New York City residents can use this letter to dispute a debt, to verify a debt under NYC law, and to tell a collector to stop contacting them. This e-book provides templates for 21 most effective credit and collection letters that will help you communicate better with your customer.A credit dispute letter is a document that helps you dispute any errors on your credit reports. Use this sample letter to dispute incorrect or inaccurate information that a business supplied to credit bureaus. A letter of explanation can clarify your financial situation and get you one step closer to qualifying for a mortgage. 1. In the sample letter, fill in your personal information. You have to tell your credit or debit card company about any error you're disputing within 60 days of when the first statement with the charge was sent to you. The Second Collection Letter Template. Simply fill this letter out and send it to the bureaus with your latest address proof, id , ssn copy. Reply. Looking at my financial situation, I have set up a budget for my basic living expenses and have come up with a debt repayment plan based on my.