Thieves who start with a credit card number may also obtain a victim's phone number, physical address, e-mail address and other data that can be used to gain further information on the target or open up new lines of credit in the victim's name.
Card theft triggers bigger woes "When someone gets more than your credit card information, that's when it gets dangerous, because they can also do things such as tax and employment fraud," Mitic says.
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The criminals who steal credit card information generally do not use it themselves, but sell it to scammers via underground chat rooms.