Known issues

It is not yet possible to create and use credit card aliases with off-site e-Commerce gateway, as it is not supported by Drupal Commerce yet. See relevant d.o. issue Allow offsite payment gateways to create and use payment methods for more information.

When adding a new payment for orders created from the admin UI using a credit card that supports 3-D Secure, the return from the 3-D Secure pages fails. There is a pull request waiting to be merged into Drupal Commerce that will fix the issue.