Debit card cashback is a service offered to retail customers whereby an extra amount of money is added to the total purchase price of a transaction (paid by debit card) and the customer receives the extra amount in cash along with their goods. For example, a customer purchasing £18.99 worth of goods might ask for twenty pounds cashback. They would pay a total of £38.99 (£18.99 + £20.00) with their debit card and receive £20 in cash along with their goods. Many customers find this a useful way to obtain cash, instead of making a separate trip to a cash machine. The idea was originally hatched by Tesco in order to reduce the amount of cash banking stores needed to carry out, the customer service aspect being a side-effect of this.