“Retailers will now be able to charge consumers for using a Visa or a Mastercard card and they’ll be able to adjust their prices based on the cost of accepting different credit cards. That could mean, for instance, that a consumer with a Chase Sapphire Reserve card, which carries the Visa Infinite branding and therefore comes with a higher interchange fee, would be charged more at checkout than a customer using a Chase Freedom Unlimited card.”

(Bloomberg article)

How is that going to work in practice? Do merchant terminals have a way of determining the type of card and display the card-specific fee for customer approval? Will merchants maintain a photo book of “expensive” cards and check every card against the list? How will that work with mobile payments - does the phone pass the card type to the terminal? Do I need to show the merchant the picture? Can I get a discount if I use a prepaid debit card (of course, paid for with a credit card)?