Temporary Blocks of Debit Card AFTER hours (888) 241-2440. Real Estate Payoff Statement Request Contact Loan Servicing.A payoff request can be created and mailed for free. How long does it take to obtain a payoff? Simply fill out our contact form, and one of our experts will get in touch with you soon. The Homeowner Mortgage Servicing Unit is open and available to process your requests during regular business hours. Processing times is currently 8 weeks. Homeownership is a dream for many Houstonians but is out of reach for many residents. ISN processes the loan servicing activities associated with Partial Claim Subordinate Mortgages and other HUD Programs. 6200 to complete an application and determine your eligibility.