Unlimited Checking $100 opens this account. FREE Anytime Check Card. With Unlimited Checking, you may write as many checks as you wish. Earns interest. Ask for current rate information. $4.00 monthly service fee. Funds insured by the FDIC up to $100,000. Click here for Checking Account Pre-Application. Back to general Checking page Stop in today at the Central National Bank, Oklahoma location nearest you.