Payment Window
In a one-off payment scenario, where no stored customer payment method will be used, you will need a payment window, where the customer can see the purchase amount and enter the payment details.
Billwerk+ Payments Checkout solves this with the charge session type.
It is a secure payment window which can be integrated directly on your website.
Billwerk+ Payments Checkout supports multiple methods of payments:
debit cards,
credit cards
and other payment schemes (MobilePay, Viabill).
Note
For added security you can have strong customer authentication by the use of 3D Secure and Secured by Nets. Here the customer will go through a flow to authenticate using a strong authentication mechanism. E.g. NemID or a one-time code via SMS before the payment is approved.