The European Court of Justice has ruled that Parma ham can only be sliced in the region where they are produced.
The verdict came at the end of a six-year legal dispute, in which Italian trade organisation Prosciutto Association of Parma sought injunctions against Asda to stop the supermarket slicing and packaging the hams in-house and selling the result as Parma ham.
However, Asda can still use the Parma name when the meat is sliced on a delicatessen counter in front of shoppers.
Since the case began in 1997 Asda, which said it would continue to press the argument that the packaging restriction would prevent cost-efficiencies, has moved its Parma ham packaging operations back to Italy from the UK.
In a linked dispute the EJC also ruled that Grana Padano parmesan cheese only qualifies as such if grated in the region where it is produces.