Welcome to the Suffolk County Clerk's Office. At one time or another either directly or indirectly, every resident of Suffolk County deals with our office.The lender should have sent you a document titled Satisfaction of Mortgage. The Satisfaction document needs to be filed with the County Clerk. Download application forms for accounts and services, get information about credit union fees and more from Suffolk Credit Union in NY. Explore online. A payoff request can be created and mailed for free. How long does it take to obtain a payoff? Only Cash, Checks or Money Orders are acceptable forms of payments. (Sorry we do not accept credit or debit cards.) See the frequently asked questions from Suffolk Credit Union in Long Island, NY. Visit us online for a list of our FAQs and contact us for more details.