(AP) — An FBI agent recently showed Arnaud de Laforcade a file with several labels supposedly from 1947 bottles of Chateau Cheval Blanc, one of France's finest wines. To the Saint-Emilion vineyard's CFO, they were clearly fakes — too new looking, not on the right kind of paper.

But customers may be more easily duped.

Regardless of his skill, the counterfeiter had ambition: 1947 is widely considered an exceptionally good year, and Cheval Blanc's production that year has been called the greatest Bordeaux ever. The current average price paid for a bottle at auction is about $11,500, according to truebottle.com, which tracks auctions and helps consumers spot fakes.

Counterfeiting has likely dogged wine as long as it has been produced. In the 18th century, King Louis XV ordered the makers of Cotes du Rhone to brand their barrels with "CDR" before export to prevent fraud.

But it is getting more sophisticated and more ambitious, particularly as bottle prices rise due to huge demand in new markets, mainly in Asia. After decades of silence, producers across the $217-billion industry are finally beginning to talk about the problem and ways to combat it.

The astronomical prices paid for fine wine these days makes the bottles "more than just a luxury item," said Spiros Malandrakis, senior analyst of the alcoholic drinks market at Euromonitor, a research firm. "They become a currency in themselves. And as with every currency, at some point, people want to find ways to manipulate that and make more money."