The CFPB, a new agency that gained authority over credit-card issues last year, examined the problem over the summer but hadn't previously signaled changes.

WSJ: Moms May Benefit From Credit-Card Rule Fix

At the end of the year, Bank of America sent some of its BlackBerry-using customers in New York a memory card with an NFC chip capable of making a wireless payment when waved in front of special terminals found in subway stations, drug stores and taxi cabs.

WSJ: RIM, Carriers Fight Over Digital Wallet