Once you create a bank account for your customer within the SEPA Secure flow, there may be a delay between the account being created and activated. Usually this happens only with the USD accounts. To keep you informed, we will send you a callback once the bank account is activated and ready to receive fiat deposits.
For the time being, SEPA Secure is provided only within the Checkout flow. There is no need to receive this type of callbacks.
The callback data here is presented only for the demo purpose.
You may then handle this information as necessary. You don't need to send us anything back other than a success status so that we know the callback has been received and handled on your side.