I phoned up Taylormade today to check the serial number that was on the hosel of one of my irons.Taylormade told me the numbers I gave were showing up as unknown but this is not a problem because it is a bulk dispatch number and does not always identify the irons?? What is the point of putting these numbers on the irons of genuine clubs if they are going to show as unknown and not identify them? The mind boggles....