Core Features Abort Reference Aborting a created payment. Callback Receive asynchronous, server-to-server updates from Swedbank Pay when transactions are performed on a payment. Reversal How to reverse a payment. Settlement & Reconciliation Balancing the books. Optional Features Custom Styling Styling your payment UI. Payment Link Sending the payment via mail or SMS. Recur Setting up subscriptions and recurring payments. Unscheduled Purchase Merchant initiated transactions.