If you use an university or governmental credit card, we will advise you to contact the finance department in your organization. Often they have to contact the bank to open the payment option. If you are using your private card, please contact the card issuing bank. It is possible that they need to open the allowance or you need to authorize the payment. Please note that the merchant name behind the credit card transaction is "The Meeting Planners A/S" in Denmark. If you do not complete the payment, the registration data will not be submitted. You will receive an email notifying you that you have an "incomplete registration". Following the instruction on the email to start the registration again once you have contacted your card issuing bank or organization.