Abstract:This research focused on the impact of unauthorized information use on consumer in the context of mobile shopping APP. Based on the 269 consumer questionnaires, we tested our conceptual model and hypotheses. The research results indicated that unauthorized information use increases consumer’s perceived information vulnerability which then promotes the switching behavior. Additionally, we also found that the effectiveness of privacy setting and effectiveness of privacy policy both can mitigate the positive relationship between information vulnerability and switching behavior. This study not only facilitates the development of related literatures, but also provides for mobile shopping APP companies to manage the consumer information and privacy.