The highest-profile wine fraudster is Rudy Kurniawan (known as 'Dr Conti'), who spent seven years in prison from 2013 for selling millions of pounds worth of counterfeit bottles between 2004 and 2012; many sold through auction houses. It’s an extreme example, but lower-level wine fraud is believed to be widespread, with experts estimating that 5% of wines sold are fake. It usually involves lower-quality wines being bottled under the name of a prestigious label or selling a lesser vintage as one that’s far more sought-after.

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