Last I heard, they were still selling this pass to US and Canadian residents, though I've been told the Fun in the Sun Pass is not supposed to be sold in North America. This is definitely a "grey market" situation, so buy with caution. I do know that Americans have successfully used the 30-Day pass in the past without problems. You receive a voucher that must be exchanged at Guest Services on your arrival. I've heard from several people who showed US drivers' license or similar ID when exchanging vouchers for the passes and there was no problem.