To book Ulysses hotels, you need to enter the data of your credit card. All information you give in is encrypted before the transmission, which ensures the privacy of the entered data. The credit card information is used only to guarantee your checking in. Most hotels gives you the possibility to cancel your reservation 24 (48, 72) hours prior to the check-in date. If you really need to cancel your booking request, follow the Check/ Cancel reservation link on the main page. The room charge will only be debited to your account after you check into the selected Ulysses hotels.