Why can't these companies simply give a unique ID to each item they sell and allow owners to register them online, just like the DMV with cars. In this way you will know what is fake, who bought what, ownership exchange etc...
That would solve the problem of people accidentally buying fake Chanel products. Is that really what Chanel is concerned about here? When I first read this article, I assumed that Chanel was trying to cut down on the number of people who deliberately purchase fake Chanel products since they cost a fraction of the price and are not easily discernible from the real thing.