Whether you're looking to book a hotel, choose a restaurant or hire a plumber, a host of online review sites can help you make the decision. But who's behind the feedback on such sites? Experts say that it's not always satisfied customers penning paeans to their favorite businesses, but rather companies themselves that are paying for glowing reviews. In our March issue, InsideCounsel examines the trend of paid-for reviews—and the possible risks that the practice could pose for companies.

How often do companies buy fake reviews?

A recent study by IT research firm Gartner Inc. found that between 10 and 15 percent of online business and product reviews are tainted in some way. In some instances, companies use sites such as Craigslist, Freelancer and Fiverr to find people who will write positive reviews in exchange for anywhere between $1 and $200, according to Jenny Sussin, a senior research analyst at Gartner.