At MacStadium, we make use of fraud protection services that use multiple layers of security to identify and stop fraud before it happens. These measures are in place to help ensure the security of our network and the best possible experience for our customers. Because of these additional security measures, it's possible that your credit card transaction could be flagged by the system during signup, even if the credit card is valid. If this happens, please contact us via phone, chat or open a ticket in your dashboard. Read more about this topic here.