I overheard a conversation where a gentleman tried to exchange 50 Euro to US Dollar and he was offered an even $40. The same goes for the exchange of cash at the Guest Assistance Desk. This might be different when you pick a cruise ship such as AIDA, TUI Mein Schiff, MSC, Costa etc which have mostly European audiences. These fees can add up quickly and keep in mind that the onboard currency will always remain the same (USD) no matter where in the world the cruise is sailing. Keep in mind, that every time you make a withdrawal on a Celebrity cruises onboard ATM you incur a $6.50 charge plus whatever your bank charges for using an ATM outside their system. I just got off a two week cruise with Celebrity Cruises in the Mediterranean and I couldn’t believe how often I’ve seen people use the ATM on board the ship (EDGE) and there were even receipts laying around, showing small amounts of withdrawals.