Green Dot Corporation is an issuer of prepaid MasterCard and Visa cards in the United States. It also transfers individuals' direct deposit funds (such as Social Security payments) from the US government to personal bank accounts. The cards may be used like normal debit or credit cards, but they are not backed by a checking account or line of credit. Purchases are deducted from the balance stored on the card. The user can add more money to the card by paying cash at a retail store's point of sale, or in certain cases from their paycheck.