SunTrust Online Banking lets you view balances, transfer funds, pay bills and update your profile from one location, Sign Up Today Link opens a new window. The Security Access Code is a distinctive code composed of letters and numbers, sent to you after you inform SunTrust that you would like Online Banking and. Sign On. The User ID/Password you entered does not match our records. Please correct the following errors. Online Banking Sign On. User ID Sign Up Now.