This article provides a template for a debt settlement proposal letter and explains what a debt settlement letter should contain. Speaking with your creditors will enable you to work out the details of any payment plan that you can later confirm with your letter.What should I include in a debt settlement letter? A debt validation letter is a written communication that a consumer sends to a debt collector or creditor to request verification and validation of a debt. List your name, account information, the original creditor of the debt, and the debt collection agencies identifying information. Use this letter to help you negotiate a full and final settlement offer with your lender. Additional Information About This Loan x x x x x.