Simply, fill in the information on the form and we will send you your payoff quote. Looking for a payoff amount?How do I get a payoff for one of my Fifth Third loans? You can pay off your mortgage with a check. To request a copy of your mortgage discharge or a paid in full letter, please call our Customer Service Department at 800-968-7700. Can I arrange to pay off my financed vehicle online? Can I request a quote for my financed vehicle online? Scroll halfway down on the right-hand side under "Want to pay off your loan?" and click 'Request Payoff'. Woman video chatting. Instructions to submit payment using wire transfer or check are included in the letter.