| ||How do McDonald's debit card payments get processed in under a second in Italy?|
4 points by ceoloide on Dec 4, 2013 | hide | past | favorite | 9 comments |
|Hello fellow HN readers, I have a question that has been puzzling me for a long time now.|
When you pay with Debit Card at a McDonald's in Italy, your payment get "processed" in under a second. By "processed" I mean that, after you have confirmed your PIN code, you receive confirmation and you are prompted to retrieve your card in under a second.
How does McDonald's do that? I haven't seen any other retail store or merchant that can achieve the same result, all the others take a lot more than 1 second (and in some cases more than a minute).
Does anyone have good reading recommendation to learn more about bank transfer protocols or systems?
Thank you all for your inputs!
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