A cup of coffee here, a hamburger there, a fill-up at the gasoline station on the way to work. Customers are starting to use their contactless payment cards at convenience stores, fast-food restaurants and supermarkets throughout the United States. Merchants, who will have a lot to say about whether this becomes a common form of payment, are cautiously optimistic. They report that tap-and-go cards and keyfobs do allow customers to pay more quickly, a key selling point for contactless. And they say few of the first customers adopting the technology are having trouble figuring it out.
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