I don't know if it is on his report that way, he just got the card.
Yes, this is his card and his alone, he is not an AU nor is it someone elses account.
The card works too because he took a bunch of us out for pizza and beer and it wasn't declined.
I think it is hilarious that his card says member since 1963 and he wasn't born until 1965. Apparently he applied for this and was approved when he was negative two years old. Not even a gleam in his daddy's eye.