Internet searches have become common practice for hiring managers and recruiters, who say the effort sometimes yields useful information about candidates -- things employers wouldn't have learned from a resume and cover letter alone. "Smart hiring managers will always Google their prospective people," says Allison Hemming, president of the Hired Guns, a New York interim-staffing company. "If you've got a sixth sense about somebody and you're not really sure why you're feeling that way, Googling can really help you out in vetting a candidate."

At Chicago-based staffing firm Corporate Project Resources Inc., which places marketing professionals in jobs on an interim basis, "Google is something that we use a lot," says Sheri Karley, recruiting manager. Staffers there often perform an Internet search along with a background check and personality test when they screen candidates, Ms. Karley says.

But such searches can be a land mine for job-seekers. There's a bevy of information on the Internet, including things you may not realize are out there. Searches can turn up everything from personal Web sites and blogs to old company newsletters to articles you wrote for your college newspaper. "It's almost like a shadow résumé you haven't exactly made but it's following you around," says Pam Dixon, director of the World Privacy Forum, which studies workplace privacy issues. She says some of the worst problems for job-hunters arise when people fire off angry or vulgar e-mails that find their way onto the Internet. "Most Google damage is self-inflicted," Ms. Dixon says.

READ: Recruiters Use Google To Screen Job Applicants

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