Carnival Cruise offers various forms of payment for reservations to accommodate different preferences. Typically, guests can use major credit cards such as Visa, MasterCard, American Express, and Discover to pay for their bookings. Additionally, Carnival often accepts debit cards with a Visa or MasterCard logo. Some guests may prefer to use electronic bank transfers or travel agency payments, depending on how they book their cruise. It is important to note that Carnival may require a credit card to guarantee reservations, even if alternative payment methods are used for the final payment. Furthermore, in certain cases, Carnival Cruise may accept cash payments for onboard expenses, but this is usually not applicable for the initial booking. To find the most current and detailed information about payment options and any potential changes, it is advisable to check the official Carnival Cruise website, where additional details and updates are available.