One in five teenagers have purchased fake ID over the internet in a bid to buy alcohol, a new survey has claimed. The study of 1,200 teenagers also revealed that one in two have purchased alcohol underage.The Clarity Commerce survey discovered that 78% of over 18s have also lent their ID to underage children. The study comes just a week after the government launched its Proof of Age Standards Scheme (PASS) in London. Michel de Beer, at Clarity Commerce, which is helping retailers in Holland combat the underage selling of alcohol, said: ““Whilst the Government’s efforts are well meant, the survey results show that ID schemes have had their day as they do not offer enough support and protection to businesses. “ID cards on their own just do not work – children are getting around them as they know all the tricks of the trade when it comes to fooling businesses and the general adult population.”