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You can see the programs in action at other online software companies like Digital River and VioSoftware.com.
Enrolled cardholders need to submit the pin or password they created. Non-enrolled cardholders or cardholders who bank's aren't participating will not be prompted although in most instances you will not be liable, but it's relative to the card type. Both programs qualify you for the lowest possible ecommerce interchange rates so you will also start to save money on processing fees.
Call your bank for details.