Just FYI, but a couple of years ago my DH *did* have trouble activating one of those old tickets from 06 when he was alone in Orlando. When he took it for conversion, guest services gave him a very hard time about where he got the ticket. He was not the original purchaser, because I was, and he and I don't have joint credit card accounts, though our address is the same. Even though they had been purchased directly from Universal online, they were questioning how he had obtained them and were asking for the purchase receipt. He contacted me and I faxed it down to them, but by the time I did they had already decided to let him have the value of the ticket; however, it took about an hour and the input of several staff members before they did so.
So, it is possible that Universal may question where the ticket came from and ask for some kind of proof that you (or someone close to you) were the original purchaser.