An ATM is an electronic banking terminal that allows you to perform everyday financial transactions such as withdrawing cash, transferring funds between accounts, checking balances, and making deposits, through the use of a Check/ATM Card and a personal identification number. ertificate of Deposit (CD) A Certificate of Deposit is an investment account that must remain on deposit for a specific period of time. A request for early withdrawal may be subject to penalty. Certificates of Deposit are insured by the National Credit Union Administration (NCUA) and offer a generally higher dividend rate than savings and money market accounts. The dividend rate is guaranteed until the maturity date (unless specified otherwise).