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> To her shock, Bongiorno saw three more withdrawals from her account -- $940 was gone. What does a receipt prove? That you have a document for one withdrawal,
by moremetadata 4y ago
> To her shock, Bongiorno saw three more withdrawals from her account -- $940 was gone.
What does a receipt prove? That you have a document for one withdrawal, and most people could be forgiven for assuming a withdrawal is a single transaction.
The ATM operator could see if subsequent transactions took place, but Chase probably cant, unless it forcibly introduces a time limit of 5 to 10 mins on each withdrawal from the same machine. In part this is a data sharing contract with ATM operators.
This is where mobile phones in particular SS7 can be used to place your mobile phone and apple watch next to the ATM in order to prevent fraud, but then also highlights who is data sharing with who, especially if your phone doesnt log the cell tower traffic management pinball wizard in order to triangulate the phone's location.
https://en.wikipedia.org/wiki/Signalling_System_No._7 https://en.wikipedia.org/wiki/Signalling_System_No._7
- salawat 4y agoPhones don't log that info. Cell towers do. there is no way to have a cellular phone and not be triangulable. not with a cell network with fully overlapped coverage areas.
- WirelessGigabit 4y agoBecause a receipt is a forcing mechanism for the system to close the transaction. No sane system allows for continued charges on a card when a receipt has been generated without re-authentication & re-authorization. Plus it gives me, the customer, additional leverage in the case where they do screw up. I printed the receipt at 0944am. At 0945am someone withdrew $100. No new authn/authz. No jury would allow these withdrawals to stick on the original account.