Funny little story (NoT!)....
My daughter and I took a cab from AllStar Music to Universal in January. It was our first time and we were excited and up bright and early. I bought my Universal tickets from Expedia because I got a day free and printed off the voucher to redeem when I got there. I also had read about not bringing bags so I don't have to use lockers at the park, so I had only brought my money and the voucher.
So we're $17 into the cab ride and had just passed Downtown Disney when I decide to look at my voucher and realize I need to show ID!!! So we have to turn around and go back to the hotel and
$75 later, we're at IOA.
Looking back, I think A) why didn't I read the voucher more carefully, and B) no kidding I need my ID to redeem the voucher!! What was I thinking?