If the relevant integration has been set up, subscribers can sign up for automatic payment through self-service. This can include:
Automatic card payment (requires Quickpay and an acquiring agreement)
Vipps MobilePay (requires a separate agreement with Vipps MobilePay)
Betalingsservice (requires an agreement with Mastercard Payment Services)
Read more about payment agreements. (article is in dansih)
When logging into self-service, subscribers can view their subscriptions. By clicking on “Payment” for a subscription, they can choose how they wish to pay for that subscription.
You can also change the payment method in the same way (e.g., from credit card to Betalingsservice).
Read more about handling expired cards (article is in danish)