Debit card

A debit card (also known as a bank card or check card) is a plastic card that provides the cardholder electronic access to his or her bank account(s) at a financial institution. Some cards have a stored value with which a payment is made, while most relay a message to the cardholder's bank to withdraw funds from a designated account in favor of the payee's designated bank account. The card can be used as an alternative payment method to cash when making purchases. In some cases, the primary account number is assigned exclusively for use on the Internet and there is no physical card

Types of debit card systems

Online Debit System

Online debit cards require electronic authorization of every transaction and the debits are reflected in the user’s account immediately. The transaction may be additionally secured with the personal identification number (PIN) authentication system; some online cards require such authentication for every transaction, essentially becoming enhanced automatic teller machine (ATM) cards.

Offline Debit System

Offline debit cards have the logos of major credit cards (for example, Visa or MasterCard) or major debit cards (for example, Maestro in the United Kingdom and other countries, but not the United States) and are used at the point of sale like a credit card (with payer's signature). This type of debit card may be subject to a daily limit, and/or a maximum limit equal to the current/checking account balance from which it draws funds. Transactions conducted with offline debit cards require 2–3 days to be reflected on users’ account balances.

Electronic Purse Card System

Smart-card-based electronic purse systems (in which value is stored on the card chip, not in an externally recorded account, so that machines accepting the card need no network connectivity) are in use throughout Europe since the mid-1990s, most notably in Germany (Geldkarte), Austria (Quick Wertkarte), the Netherlands (Chipknip), Belgium (Proton), Switzerland (CASH) and France (Mon€o, which is usually carried by a debit card). In Austria and Germany, all current bank cards now include electronic purses.

Prepaid debit cards

Prepaid debit cards, also called reloadable debit cards, appeal to a variety of users. The primary market for prepaid cards are unbanked people^, an umbrella term used to describe diverse groups of individuals- typically with poor credit ratings- who do not use banks or credit unions for their financial transactions.