A 10day payoff refers to the time it takes for your new lender to pay off your old loans during a refinance. I have a car loan from ally that I am trying to refinance, the new lender has asked for a ten day pay off balance quote, I'm unsure what I'm supposed to send.We're here for you at every turn. Manage all aspects of your TD Auto Finance accounts from monthly payments to account payoff. By including a per diem amount in the letter, the parties will not have to execute another payoff letter if the termination date. That letter must include the following four paragraphs: 1. A payoff agreement is an informal contract in which a creditor agrees to accept the balance of a debt owed as full payment. TD Auto Finance United States (US), is a financial-services provider for retail consumer and dealer services. Your 10day payoff letter is crucial to ensuring that your new lender sends the correct amount of money so there is no outstanding loan balance left over. Court of Appeals, Houston, Texas.