I have RZ and had to switch my cc number by calling TM, and they provided me with the info I needed to send them to verify everything. A few days after emailing them a rep called me back stating that since my tix are will call (they're not) and not CC entry (they are) I don't need my credit card for entry. He was clearly misinformed by bis supervisor and I had to go through the whole thing about RZ, CC entry, etc and he was trying to convince me that I was wrong. After going back and forth for awhile I told him to just switch it over for my peace of mind. I guess it depends on the rep you speak to, but don't let them convince you otherwise if they tell you that you don't need to switch your cc#.