Artist Damien Hirst has made a complaint to the UK's internet arbitration service after another artist set up a website in his name.
Hirst's official site is currently under construction
Simon Phillips, who describes himself as an "internet artist", has been in dispute with Hirst since he set up the www.damien-hirst.co.uk website.
Hirst has threatened Mr Phillips with legal action if regulator Nominet fails to rule in his favour.
Mr Phillips posted "my arse is nothing to do with Damien Hirst" on the site.
Phillips has set up a number of websites with addresses referring to famous figures, including London mayor Ken Livingstone and artist Tracey Emin.
Hirst's company Science claims that Mr Phillips is profiting from the site and that it could be confused with Hirst's official site, which is due to be launched shortly.
"He has claimed that [the website] was a forum for discussion and giving opinions, but actually it was about making money," said Science director Jude Tyrrell.
Visitors to Mr Phillips' website are greeted by this holding page
Mr Phillips claims that he has made only £150 from the 15 sites he runs, and set up the website as a form of self-expression.
According to his weblog, he received a letter from Hirst's lawyers in June which prompted him to take down much of the site's content.
The site's front page has been changed to "Straight out of Old Compton Street" - a reference to London's gay district.
Clicking through to the main page brings up a notice saying "this officially un-official official website is now officially closed".