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SUFFOLK -- Like tens of thousands of others, David Xavier has had his credit card number stolen.

It wasn't long before the thief went shopping.

According to cybersecurity experts at Sera Brynn in Suffolk, Xavier's number was probably sold in what some people call the underground community of the Internet. It's where the criminals hang out to do all things illegal.

13News Now journeys to the underground Monday at 6 p.m. What we found will make you want to hold on to your personal information a bit tighter.

Click here for complete investigation

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