A town in England with a modest population of 10,000 or so has chalked up the highest percentage of online transactions flagged as fraudulent by a U.K. security analyst.

More than 24 percent of the e-commerce transactions done in Shildon, in the northeast of England, were flagged as fraudulent, said Andrew Goodwill, a director of The 3rd Man, a security company that specializes in preventing credit-card fraud.

Retailers can subscribe to The 3rd Man's Gatekeeper service, which evaluates transactions made where the cardholder and card are not present in the store, and recommends rejecting ones that appear risky.

One warning factor, for example, is if the shipping address for an item is different from that of the cardholder. Another one is if a card has been used before in a fraudulent transaction.

More: http://pcworld.com/article/171536/

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