'TripAdvisor has been ordered to rewrite some of its marketing claims by the UK's Advertising Standards Authority.
The ruling follows complaints by hotels that the site had said that its holiday reviews could be "trusted".
The watchdog said that the ruling served as a warning to all sites with user-generated material.
It (The ASA) said that two hotels and the online reputation firm Kwikchex, which represented others, had complained that the claims were misleading since they could not be substantiated.
"This should be regarded as a benchmark ruling which applies to all web sites which make claims about the reliability of their user-created content," the ASA's spokesman Matthew Wilson told the BBC.'
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