Today a customer pulled out an ATM card and then switched it for a credit card, but not before we noticed that they used a sharpie to mark "ATM" and Credit" on each card.
Why?
Because, they could not identify the difference between the two cards. If cardholders are confused, think of the harried sales clerk who needs to identify with lightening-fast accuracy whether to perform a credit or debit transaction. Read this recent posting to understand the depths to which Visa® and MasterCard Worldwide® go to process cards at the much higher percent -of-sale credit card merchant interchange rate.
[source: WayTooHigh.com]