Once you have made a full or partial payment on a cruise, you must go online to register.  You will need your reservation/confirmation number from your invoice.  Registration allows the cruise line to communicate directly with you if there are changes to the itinerary or they require further information from you.  It will also allow you in some cases to book shore excursions and specialty dining.   Select your cruiseline below to be taken directly to the registration page. Those on Paul Gauguin, Silversea, and Regent see the notations below.