“FIS’s online-payments processing unit has begun replacing terminals made by PAX Global Technology Ltd. due to concerns about their security, according to messages reviewed by Bloomberg News and people familiar with the matter. The business, called Worldpay from FIS, told partner companies on Oct. 8 that it had decided to remove PAX devices in favor of point-of-sale equipment manufactured by two competitors, U.S.-based Verifone and France’s Ingenico, according to a message reviewed by Bloomberg News.”