Are you using Fintech services such as mobile payment (e.g., Kakao Pay, Apple Pay, Samsung Pay, etc.)? If not, what are the reasons? At the early stage of the diffusion of Fintech, one of the issues raised was the concern for information security. This study focuses on the user resistance which obstructs the proliferation of Fintech, and it verifies the interaction effect between information privacy concern and personal propensity (i.e., regulatory focus) on actual users’ resistance. Regulatory focus is the motivational strength; and self-regulatory orientation is enhanced when a person pursues a goal in a way that maintains the person’s own personal values and beliefs. There are two focus orientations: promotion focus and prevention focus. When a user has promotion focus orientation, s/he will behave actively to achieve the goal, while a user having prevention focus, s/he will behave passively to prevent the mistake and loss. This study also investigates the impacts of social influence and mobile Internet literacy on information privacy concern and user resistance. The results show that, in particular, information privacy concern about collecting too much personal data increases user resistance; and the interaction with promotion focus orientation, rather than prevention, has significant impact on user resistance. The results also indicate that the degree of social influence and mobile Internet literacy can affect information privacy concern and user resistance. Based on the findings, this study provides implications for service providers which attempt to reduce user resistance to Fintech services and proliferate Fintech usage.