Due to internet security, we protect our visitors with the latest industry standards for credit card authorizations and your issuing bank may have declined the transaction on the basis of not supporting address verification online. We also constantly update our website and you may have been trying to book during one of these updates. Clearing your cookies and your internet browsing cache might help resolve the problem. If you continue to have problems booking your tickets, please call our reservations department at +1.415.981.7625 to book over the phone.