You can each use your own Photopass card, but when you register them when you get home then it has to be under 1 account. You have 30 days to view them from the date the first card is entered. It is a good idea to write down the number of the card you have in case it gets lost. And you can get more then 1 in case you forget it at the hotel room, but all the cards must be under the same account!