Hi
I bought mine online. I bought the one year one so it was an external link. When I got to Universal they called it a “third party.” Not sure why. It seems like it’s My Universal Photos, the same as the other.
Anyway, I went to guest services (for something else and asked them about it) and they told me to go to the Universal Photos store inside the park just past the entrance. I went there and he told me to go to guest services. But I told him they told me to go there and showed him my email purchase receipt on my phone and then he said Oh okay that one I can do. Then he made an announcement to everyone on line that they had to go to guest services to print out a voucher or something like that. It seemed a little odd in this day and age with all the technology they use.
He then told me to forward my email to him and gave me an email address (a gmail address which I found weird), which I did. Then he gave me the card with the QR code on it and a lanyard and I asked for a couple more for the rest of my party and he gave me more cards (not more lanyards.)
I think you’re supposed to print out the email and bring it with you. Read your email and see what it says. I forgot to print mine but it worked out okay for me.
Sorry if I just confused you more, but that was my experience.