Agency review site raterAgent has found that 17% – just over one in six – of all attempted reviews are efforts by agents, or someone they know, to falsify their own or a competitor’s reputation.

Mal McCallion, raterAgent co-founder and CEO, said: “It’s one of the reasons why we welcome the investigation by the Competition and Markets Authority into review websites.

“We created raterAgent at the beginning of 2015 to be the place of safety for agents wanting to benefit from independent verification of their genuine customer reviews, untarnished by the rampant cheating that just isn’t caught elsewhere.”

Last week, the CMA announced its investigation of online review sites, saying it had found instances of businesses writing fake reviews themselves, and firms writing or commissioning fake negative reviews to undermine rivals.

McCallion said that raterAgent’s latest analysis lays bare the intentions of lying agents.

It found that 78% of fake submissions are five-star reviews given of themselves by estate and letting agents – or their partners, friends, family or other representatives.

The remainder are what raterAgent calls ‘one-star bombs’ hurled at a competitor.

McCallion said: “Faking reviews, whether to improve your own online standing or damage someone else’s, is not just a disreputable way to behave – it’s illegal in many instances and we’re volunteering to help the CMA and anyone else that wants to stamp out these practices.

“We are meticulously building evidence against repeat offenders and there will come a time, I’m sure, when we will have to ‘name and shame’ which agents are continually flouting our rules regarding fake reviews.”

The site uses a ‘triple-lock’ check for fraudulent reviews.

A unique algorithm processes every single review against 13 known cheating metrics, including (but not limited to) IP addresses, common fake phrase analysis and the agent’s cheating history, before giving each a grade out of 100 as to how likely it is to be fake.

Then a moderator team goes through each meticulously, searching social media and electoral roll data – amongst many other factors that raterAgent keeps intentionally secret – for evidence of the reviewer’s existence and any relationship to the reviewee.

The third check is to write to the reviewer of any that are believed to be fake, asking them to prove that they have been involved with the agent.

Failure in this results in the submission being marked as ‘fake’ and not allowed on to the site.

McCallion said: “We’re building a uniquely trustworthy resource for agents to prove the quality of their service.

“Everyone knows that there are sites out there that positively encourage fake reviewing, mainly for commercial considerations. raterAgent champions trustworthiness because, in the end, that will bring genuine sellers and landlords to the site and enable the best quality agents to win new clients at a stronger fee.”