Payoff Request Form. First name, Last name, Account Number (optional), Phone, Street address, Apartment, suite, etc.W. Correspondence and Model Forms from Nassau County Clerk. 1. Use SmartAsset's free New York mortgage loan calculator to determine your monthly payments, including PMI, homeowners insurance, taxes, interest and more. A. Arrange for payoff of loans. The seller should advise its bank of the projected closing date and request a pay-off 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.