1) Call the mortgage department and request an official principal payoff letter. A mortgage payoff letter can come in two forms.One form tells borrowers the remaining principal amount and interest they have to pay to close out the loan. This is an example of a payoff letter used in a syndicated loan transaction. This payoff letter (including the defined terms such as Lenders,. Use a standard business letter format with your name, contact information, and the date at the top. It is organized into three levels. An Equity Investor certification letter (ADOH sample form provided). Efforts pay off in the long-term. The source of the information provided in the Disclosure Statement;. 5.