New York Attorney General Eric Schneiderman

Nineteen companies caught writing fake reviews on websites such as Yelp, Google Local and CitySearch have been snared in a year-long sting operation by the New York Attorney General, and will pay $350,000 in penalties.

The Attorney General's office set up a fake yogurt shop in Brooklyn, New York, and sought help from firms that specialize in boosting online search results to combat negative reviews.