Apparently not. I was upgrading my wife’s EFL Cup Scheme Senior ticket to Adult for my son. I was told that you buy a new ticket (for the same seat) and they would refund the original ticket. Just how that differs from upgrading I don’t know. My wife attends the week end matches and my son does the mid week games. Every time it appears different. Sometimes it goes on the card, sometimes an e-ticket and sometimes they post out a paper ticket. It is most confusing.