thanks; we're back and we tried it out. We booked the same day and woman on the phone had no issue noting it down. Then, in the restaurant, we had to ask for it and to our surprise, instead of actual fastpasses, they wrote something on our receipt and told us we could simply show that at the queus... we didn't try it though, because we didn't have need for fastpasses anymore... they did note a date though, so you probably can't use it for another day or for the other park...