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A <b>Debit card</b> is a [[ISO 7810]] card which physically resembles a [[credit card]], and, like a credit card, is used as an alternative to [[cash]] when making purchases. However, when purchases are made with a debit card, the funds are withdrawn directly from the purchaser's [[bank]] account. 

Two different types of debit cards are in use today: online and offline.  Online debit cards use the same underlying technology as [[Automated Teller Machine|ATM]]s (bank machines) that dispense cash; authentication may consist of the use of a numeric [[PIN]] (personal identification number) known only to the cardholder. PINs can be used only where the POS (point of sale) terminal is properly equipped; in particular, a separate keypad is needed to allow the customer to enter his or her PIN and select the account from which funds should be drawn.

Offline debit cards carry the logotypes of, and can be used in a manner nearly identical to, major credit cards (e.g. [[VISA_(credit_card)|Visa]] or [[MasterCard]]).  The use of a debit card in this manner may have a daily limit, with the maximum limit being the amount of money on deposit.  A debit card used in this manner is similar to a secured credit card.

Some POS terminals allow the user of a Visa or MasterCard debit card to choose whether the purchase is a "credit" or "debit" purchase.  In a "credit" purchase, the user signs a charge slip (as in a traditional credit card purchase); in a "debit" purchase, the user enters a PIN.  In either case, the user's bank account is debited.  

Typically, (as of this writing) a "credit" transaction is without cost to the purchaser while a small fee may be charged for "debit" transactions.  Other differences are that "debit" purchasers may opt to withdraw cash in addition to the amount of the debit purchase; also, from the merchant's standpoint, the merchant pays lower fees on a "debit" transaction as compared to "credit" transactions.  

The fees charged to merchants on "credit" debit card purchases -- and the lack of fees charged merchants for processing "debit" debit card purchases and paper checks -- have prompted some major merchants to file lawsuits against debit-card transaction processors such as Visa and MasterCard.  Visa and MasterCard recently agreed to settle the largest of these lawsuits and agreed to settlements of billions of dollars.

Many consumers prefer "credit" transactions because of the lack of a fee charged to the consumer/purchaser -- and many POS terminals at PIN-accepting merchant locations now make the "credit" function more difficult to access.

Debit cards, and secured credit cards, are popular among college students who have not yet established a credit history.  There are also forms of debit cards (e.g. Visa Buxx) that are purchased by parents for teens as young as 13.  The parent retains a great deal of control over the teen's use of the cards.

Debit cards are also similar to [[Stored-value card|stored-value cards]] in that they represent a finite amount of money owed by the card issuer to the holder.  They are different in that stored-value cards are generally anonymous, while debit cards are generally associated with an individual's bank account.  Debit cards usually offer some protection against loss, theft, or unauthorized use while stored value cards usually do not.

See also [[EFTPOS]].

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====References====
* Adapted from the [[Wikipedia]] article, "Debit_card" [http://en.wikipedia.org/wiki/Debit_card http://en.wikipedia.org/wiki/Debit_card], used under the [[GNU Free Documentation License]]