How do I make online payments using the card?

As before, you will need to enter the following card data: the 16-digit card number, the expiration date and the 3-digit check number – both for the debit card 'BankCard' and for the s Kreditkarte.
Then s Identity (or cardTAN) needs to be used to authorise the payment.

Here is how it's done using s Kreditkarte and the new BankCard as of September 2019.