In theory is possible... but have in mind that there is the possibility that the credit card must be shown when entering the venue - and / or an ID from the cardholder...
Max, what are you saying? I thought the credit card access thing meant that this was NOT possible--TM is very clear that the original purchaser must show up at the venue and go with whoever else they've bought for. Unless maybe--you're saying the brother (or other person) would need to have the SAME credit card as used to buy the ticket? So someone would have to mail their (purchasing) credit card to the other party? And even then, if the venue asks for picture ID, then what? Or--if the credit card was issued to someone who's name is clearly not the person trying to use the ticket? (e.g., of a different gender). Please explain! If this really IS possible, it would be very handy (e.g., my parents could RZ for me, but not have to go themselves).
I was merely pointing out a theoretically possibility, but the restrictions that you mention act against it...