The new payment type should have preferences to be required and a default setting.
We can set the payment type to required using RequirePaymentType. A default kind of contradicts it, as it then will always be set.
(In reply to Katrin Fischer from comment #1) > We can set the payment type to required using RequirePaymentType. > A default kind of contradicts it, as it then will always be set. There is no contradiction. Required means that it needs to be set to something. You don't necessarily have to have a preset for a required field. A default means that it will be preset.