Citigroup is N5 Technologies’s first new target in more than a year, but the suit (2:14-cv-00242) is part of the same campaign that the NPE began almost two years ago. As in previous cases, Citigroup’s mobile banking service is accused of infringing a single patent, the only patent asserted in this campaign (7,197,297). The patent-in-suit relates to sending a text message to a mobile device in order to confirm the authenticity of a user.