Neena Bhati, Head of Campaigns, Which?, said:
“It is good to see the regulator turning its attention to review sites as Which? investigations have repeatedly exposed fake or incentivised reviews being used by unscrupulous sellers to mislead people on some of the world’s biggest websites.
“Online platforms must take greater responsibility for helping to prevent users from being duped by fake reviews and today’s announcement should serve as a warning to companies that are failing to crackdown through a lack of proper oversight.
“We are providing further evidence to the CMA that we hope will prove useful in the next phase of its investigation – and we expect the regulator to take appropriate action against platforms found to be falling short in their responsibilities to protect consumers.”