TripAdvisor hosts more than 661 million reviews of travel destinations around the globe, according to the company.
The Criminal Court of Lecce decided that using a false identity to write fraudulent reviews violated Italian law, the company said. The man was also ordered to pay about US$9300 in costs and damages. The company submitted extensive evidence of the man's activity after an investigation.
"We see this as a landmark ruling for the Internet. Writing fake reviews has always been fraud, but this is the first time we've seen someone sent to jail as a result," said Brad Young, an attorney for TripAdvisor.
The company said the man was alone in his scheme. TripAdvisor said it penalised customers of the scheme by lowering their popularity ranking or flagging their profile to consumers with a red badge on their page.
Online consumer reviews have become the lifeblood for retailers and businesses looking to draw shoppers. About half of adult consumers in the United States routinely read reviews before buying something for the first time, Pew Research Center found in 2015.
Amazon has already taken action. The company has banned paid reviews and filed five lawsuits against people who write paid reviews and companies that solicit them since 2015.
Some reviewers get paid through PayPal or with gift cards for leaving glowing reviews, The Washington Post reported in April.
The proactive focus on fraudulent reviews is laudable, Noonan said, and companies are increasingly deploying algorithms and fraud investigators to catch perpetrators.
But companies have a perpetually uphill battle. Fake reviews are often indistinguishable from real ones after a close read, Noonan said, even to him.