High Quality Content by WIKIPEDIA articles! ACS:Law was a United Kingdom law firm specialising in intellectual property law. Prior to 2009, its most notable case was the defence of a British national accused of public indecency in Dubai. The firm is best known for its actions against persons allegedly infringing copyright through peer-to-peer file sharing. The firm ceased pursuing file sharers in January 2011 and ceased trading on 3 February 2011.