I tried to check mine as well, and they can't. For the previous poster that said they did, HOW??? They have to scan them, and even the Disney stores can't. I had some kids tickets that had a day left on them and they are now teens/adults, and on my last trip I went to EPCOT guest relations and they upgraded them to adult tickets, with no charge. But nothing could be done before that. I tried too. The CM's just have no way to check it.