Not from Spain to the U.S., but last week, on a trip from Mexico City to the U.S., my father bought two bottles of wine at the duty free store. He was told the flight attendant would give him the merchandise at the end of the trip. Once he landed in the U.S., the flight crew knew nothing about his wine...He was going to try to get his money back, but I don't know if he did.

So I suppose that is the new regulation, you pay at the store, you get your products once you get off the plane....if they don't forget to place your order!