This is a sample Florida mortgage payoff authorization form and should not be used or relied upon for any real estate transaction. Edit, sign, and share sample payoff letter for private mortgage online.No need to install software, just go to DocHub, and sign up instantly and for free. These letters provide the exact amount needed to pay off a mortgage in full, including any interest and fees. 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. We request you furnish our office a written payoff with per diem, please fax the payoff as soon as possible to (352)282-4895. Adjusting paperwork with our feature-rich and intuitive PDF editor is simple. In the formula, B stands for the payoff balance due in dollars. L is the total loan amount in dollars.