In message "Rog'"
wrote:
>For those of us who local travel to neighborhood eateries, as well
>as out of town: Apart from the who-sees-my-CC issue, I recently
>experienced a duplicate charge. I tend to pay my CC statement
>without question as long as I recognize the merchant, but this one
>caught my eye. When I talked to the manager, he said, "This is
>happening more with touch-screen systems. Its like when you hit
>'confirm' 2x on an internet website." =R=
>
Minor omission -- It happens when you hit confirm twice on a poorly
designed website.
It's not that challenging from a programming standpoint to avoid
duplicate charges by having the "Checkout" screen include a unique
serial number.
A simpler method is to simply display a confirmation along the lines of
"This transaction is identical to another transaction which occurred
within the last 15 minutes, do you wish to proceed?"
--
Insert something clever here. |