Fallback

A transaction that is verified by a method other than the optimum available on both the card and the device. In a maturing chip and PIN environment, fallback to signature, key entry or paper will be actively discouraged and will eventually disappear altogether.
Found on http://www.chipandpin.co.uk/info/dtoo.html

Fallback

Fallback is a contingency option to be taken if the preferred choice is unavailable. It may specifically refer to: == Other == ...
Found on http://en.wikipedia.org/wiki/Fallback
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