The Rabobank system when used for online shopping using the "rabo scanner" works by redirecting to their site. Then displays a color QR code that your scanner reads.

You insert card and enter PIN, then scan the QR code.

The device actually displays amount+account that you are transferring money to. Then asks you if that is correct.

If you enter "yes", it will give you a 8 digit code that you can enter in the website to confirm.

[0] https://www.rabobank.nl/images/how_does_the_rabo_scanner_wor...

[1] https://www.youtube.com/watch?v=f5FIxRsqFUA (work flow - in dutch, start at 20 sec, before that they show the old reader)