First step is to create an account and get access to Merchant Portal Sandbox.
Make the new payment method available in your UI.
In our Brand guidelines, you will find all you need for the visuals: Logo, Color, Typography.
The Sandbox testing environment is connected to a small selection of bank sandboxes. For testing the Checkout in Norway use S'banken and for Finland use Ålandsbanken.
The table below list the SSNs and Usernames, as well as, recommended accounts to test with.