FlyerTalk Forums - View Single Post - USA EMV cards: Availability, Q&A (Chip & PIN -or- Chip & Signature) [2012-2015]
Old Jul 13, 2014, 4:13 pm
  #5455  
rgAAFT
 
Join Date: Jul 2013
Location: DFW,OVB (Russia)
Programs: AA HH Gold SPG Gold BA
Posts: 1,823
Originally Posted by joshwex90
When using offline PIN, does the terminal still check the network to ensure you can make the purchase? (Sufficient credit) Or is processed as a purely offline transaction, like on a flight? I ask because I seem to recall that in France, the impetus for doing offline PIN was the high cost of connecting all these places to a network. But if that's the case, sounds like they can't communicate with anything...
I've always wondered, how are credit card transactions processed in flight? How do they make sure you gave them a valid card?
Also, a related questions,
When people refer to an offline chip transaction, how does the chip make sure you have the credit available to make a purchase?,And then, at what point does the card/terminal have an opportunity to go online and send purchase information to the banks?

Appreciate the responses
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