If you are the holder of a Carnival Cruise Line MasterCard issued by Barclays Bank, you have several options for paying your monthly credit card payment. You can pay:
- Online: Log in to your account at the Barclays credit card site and make your payment.
- By Mail: Send your payment to the following address: Carnival Mastercard, P.O. Box 60517, City of Industry, CA 91716-0517
- By Phone: The Carnival / Barclays credit card customer service phone number for payments is 1-877-523-0478.