We are very sorry to inform you that the third-party credit card processor the services of which DomainName is using confirmed the issue with processing payments made by Mastercard credit / debit cards on their side. Please take our sincere apologies for the inconveniences this issue is causing you. Our development team is working on this and it should be resovled shortly.
We will keep you updated.
Updated 12/11/2012 at 4 AM EST
The issue resolved. In case you receive any error messages during payment, be kindly advised to contact our support center.
DomainName Customer Support
Tuesday, November 13, 2012