Download application forms for accounts and services, get information about credit union fees and more from Suffolk Credit Union in NY. Explore online. 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.Suffolk offers a monthly payment plan which allows you to spread out your costs for a small fee. Simply click the financing option below that best meets your needs and fill out the form to qualify. Only Cash, Checks or Money Orders are acceptable forms of payments. (Sorry we do not accept credit or debit cards.) Step 2: Open the payment link on your browser or smartphone, complete your credit card details. You must have the full purchase amount available on your card. Money Fit helps Suffolk residents find debt relief through trusted, nonprofit services. Find your best loan rate without affecting your credit.