Fortress Bank provides the community with sound financial solutions for business and personal use from our nine banking centers in Illinois and Iowa. If you're interested in learning how, please fill out this form and we'll be in touch.We will only issue a payoff good through the next Change Date. If the closing date is past the next Change Date an updated. 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. Sunwest Bank Mortgage Department. Please send your mortgage payments to: Sunwest Bank Attention: Note Department 2050 Main Street, Suite 300 Do not enter any letters or the dash. Click the SUBMIT button after you enter your account number. Questions?