Most business travelers have experienced the aggravation of petty charges and nickel-and-dime intrusions. An airline imposes a $50 fee for changing flights and $4 for a set of headphones, despite the fact that the traveler has spent $1,200 for a ticket and is a frequent flier. A hotel charges $3.75 for a bag of corn chips taken from the room's minibar and collects a hefty surcharge on local telephone calls.

As irritating as these practices are, banks are making similar mistakes as they attempt to introduce a new era of electronic commerce - and they are risking even more than merely annoying customers.

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