An Excerpt: To complete a debit card transaction, you may have to use a personal identification number (PIN), some form of a signature or other identification, or a combination of these identifiers. Some cards have both credit and debit features: You select the payment option at the point-of-sale.
But remember, although a debit card may look like a credit card, the money for debit purchases is transferred almost immediately from your bank account to the merchant's account. In addition, your liability limits for a lost or stolen debit card and unauthorized use are different from your liability if your credit card is lost, stolen or used without your authorization.
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