A web designer claims he is being threatened with legal action by the organising committee of the 2012 London Olympic Games.
Matt has made changes to the site since he was contacted
Matt Parker, from Cheltenham, set up a website to help Londoners rent out their homes during the games.
He said he has been asked to close the site because he is using the London 2012 Olympic title brand and is not affiliated to the games with a sponsor.
The London 2012 Organising Committee declined to comment.
Mr Parker said he was "disappointed".
"It's me and my website and I hope they reconsider and take a more lenient stance," he said.
But he also said he did not want to breach copyright, and has since changed parts of the site.