Abstract: [Purpose/Significance] Based on the dual-process model, this study verifies whether IP territorialization can affect users' perceived credibility of rumors, so as to provide inspiration for platform rumor governance. [Design/Methodology] Our research designed a 2（event location vs. non-event location）×2（IP Territorialization not disclosed vs. IP Territorialization disclosed）between-subjects experiment to verify the impact of IP territorial labels of social media platforms on users' perceived credibility of rumors and analyze the interaction between confirmation bias and IP territorialization. [Findings/Conclusion] IP territorialization significantly reduces users' trust in rumors from non-event location, and also increases users' perceived credibility of rumors from event location to a certain extent. Confirmation bias plays an important role in users' perceived credibility of rumors. Through the further analyzing of interactive effect, it is found that users whose prior knowledge is consistent with rumors are more affected by IP territorialization labels. [Originality/Value] The study reveals the important role of IP territorialization in helping users identify rumors, and further enriches research in the field of information systems on guiding the public to deal with rumors through interactive interface design.

Keywords: Rumors, IP territorialization, Confirmation bias, Perceived credibility