Bloomberg the Company & Products

Bloomberg Anywhere Login


Connecting decision makers to a dynamic network of information, people and ideas, Bloomberg quickly and accurately delivers business and financial information, news and insight around the world.


Financial Products

Enterprise Products


Customer Support

  • Americas

    +1 212 318 2000

  • Europe, Middle East, & Africa

    +44 20 7330 7500

  • Asia Pacific

    +65 6212 1000


Industry Products

Media Services

Follow Us

Fraud-Fighting Winemakers Turn to Wireless Tags, Isotope Tests

A bottle of wine is checked for authenticity
The bubble pattern on the seal of a bottle of wine is matched on the "Prooftag" website to confirm authenticity at the Blankiet Estate in Yountville, California on April 8, 2010. Photographer: Brant Ward/San Francisco Chronicle via Bloomberg
(Embargoed for use at 12:01 a.m. Eastern time on April 12.) By Ryan Flinn April 11 (Bloomberg) -- As a collector of rare and expensive wines, Claude Blankiet suspects that he’s drunk at least a few fakes without noticing. Wine counterfeiters make it hard to tell whether you’re really drinking the vintage indicated on the label, he says. And since high-end wines can fetch thousands of dollars, the incentive to create fakes is huge, says Blankiet, who makes his own highly rated Bordeaux-style blends in Napa Valley, California. “How do you know it’s a real wine? If you open up a ‘45 Mouton, is this a ‘45 or a ‘95?” he said. “When the gain can be achieved quickly and that easily, people actually do it.” To combat counterfeiting, wineries are combining the ancient art of winemaking with cutting-edge technology. They’re putting tiny radio-frequency ID tags inside labels, embedding microscopic material into the ink printed on the bottles, and even carbon dating wine to ensure authenticity. It’s an arms race with the counterfeiters, who are attracted to the industry because of the soaring prices of rare wines at auction. In the past five years, prices of the 100 most sought-after wines have increased almost threefold, according to the Liv-ex fine-wine index. “It’s almost like the housing boom,” said Neil Ivey, a sales manager at Payne Security in Washington, a firm that develops anti-counterfeiting measures for the wine industry. Bidding $48,400 At a Zachys Burgundy auction in San Francisco last month, a 3-liter bottle of 1959 Chambertin Armand Rousseau fetched $48,400. Payne relies on a special ink printed on a tag that goes over the bottle’s foil capsule. Wineries can use a handheld reader that receives a signal from the ink. That verifies the bottle came from the right place. Blankiet doesn’t want drinkers to have doubts about his own wine. Since 2005, every Blankiet Estate bottle has included a special seal with a pattern on it that can’t be replicated. The technology was designed by Prooftag SAS in Montauban, France. If the bottle is opened, the tag is destroyed. Buyers can verify the tag is authentic by logging on to a Web site. “Each tag is like a fingerprint,” Blankiet said. Chuck McMinn, the owner of Vineyard 29 in Napa, is working with Coral Gables, Florida-based IProof to incorporate RFID tags into the foil covering his corks. Phone Readers “We do recognize that our wines are sought after,” said McMinn, who founded Covad Communications Group Inc. in 1996, before moving on to wine. “So we’ve taken a number of steps to make it a headache for the copiers to try and go after our wine.” McMinn also will let buyers verify the provenance of the wines themselves. Mobile phones with RFID readers, which are widely available overseas and should start appearing in the U.S. soon, will let customers do just that, he says. “When you scan it with a cell phone, it will call up a specific Web page for the specific wine you just bought,” McMinn said. It can also be used as a marketing tool, he says. It can be set to show customers the winery’s tasting notes or offer food pairing suggestions. Another way to determine the vintage of an older bottle: the so-called bomb pulse. Nuclear weapons testing during the 1950s and early 1960s almost doubled the amount of carbon-14 isotopes in the atmosphere, says Graham Jones, a professor who specializes in wine and horticulture at the University of Adelaide in Australia. That concentration, called the bomb pulse, can be measured in organic material from that time, he says. Nuclear ‘Memory’ The bomb pulse provides a clock for dating biological materials formed after 1955, Jones says. Grapes grown during those years -- and in the decades after -- retain a “memory” of the particular vintage. The memory is still there when grapes turn into wine, he says. The wine industry is behind other fields in adopting anti- counterfeiting technology, Ivey says. Tobacco, pharmaceuticals and ID-document companies have made it a higher priority, he says. “It certainly isn’t at the stage yet where we’re seeing security divisions within wineries that think about nothing but protecting their brands,” Ivey said. “It’s usually a person or two who kind of acknowledges within a winery that there is a problem.” ‘Jefferson Bottles’ Billionaire collector William Koch has spotlighted the risk of buying counterfeit wines. Koch, who has a 40,000-bottle cellar, sued auction houses Christie’s International Plc, Zachys Wine Auctions and Acker Merrall & Condit for allegedly selling him fakes. The lawsuits started in 2006, when he filed a complaint against German wine dealer and former pop music manager Hardy Rodenstock, who sold wines he claimed had once belonged to Thomas Jefferson. Koch says the “Jefferson bottles” were counterfeits. “The people who are counterfeiting are getting more sophisticated as time goes by,” said Charles Curtis, head of North American wine sales for Christie’s in New York. Christie’s will refund a customer who suspects the purchased bottle is a fake, he says. “It definitely wasn’t an issue 10, 20 years ago,” Curtis said. “But I don’t think it wasn’t being done, I just think it was less well reported.” For Related News and Information: Christie’s stories: CTG LN CN BN On technology and wine: TNI WINE TEC BN Articles about auctions: NI AUCTION BN Top technology news: TTOP --With assistance from Elin McCoy. Editors: Nick Turner, Jeffrey Taylor, Stephen West To contact the reporter on this story: Ryan Flinn in San Francisco at +1-415-617-7176 or To contact the editor responsible for this story: Tom Giles at +1-415-617-7223 or

Please upgrade your Browser

Your browser is out-of-date. Please download one of these excellent browsers:

Chrome, Firefox, Safari, Opera or Internet Explorer.