Payoff requests, including borrower's authorization, should be directed to the servicer of the first mortgage. A fully ratified sales contract is required prior to submitting the reservation request.Do you need a loan payoff request form? What Is a Letter of Explanation? A letter of explanation is a document that the lender may request to learn more about your specific financial situation. Our standard practice is to obtain written authorization from the borrower to provide a payoff quote to the title company. Creating a payoff letter is essential to any loan or mortgage repayment process. Our free templates and this guide can help you get started. I contacted my mortgage company requesting documentation. One form tells borrowers the remaining principal amount and interest they have to pay to close out the loan.