Spain’s anti-trust agency CNMC on Wednesday cleared Amazon, Booking Holdings and Tripadvisor of participating in or facilitating fake reviews on their websites.

CNMC had been investigating a complaint filed by the OCU, a prominent consumer organization in Spain.

“CNMC found no indication that the platforms have participated in or facilitated the publication of these false opinions,” the authority said in a statement, noting the aforementioned companies had collaborated with investigators.

However, the watchdog has sent the complaint to a consumer rights authority due to a possible violation of consumer protection regulations.

Amazon, Booking, and Tripadvisor — as well as Expedia Group, Glassdoor and Trustpilot — announced in October they were launching a group named Coalition for Trusted Reviews that would fight fake online reviews.

Tags: amazon, booking holdings, spain, tripadvisor