Bckground: The SIPP application is an application created by BPJS Kesehatan in 2017, an application to accommodate complaints and a participant information center for services provided by the JKN Program. The increasing number of complaints and complaints from participants shows that the community is not satisfied with the services they receive. Objectives: The purpose of this study was to determine the relationship between knowledge and motivation of JKN-KIS participants with submitting complaints through the SIPP application in BPJS Kesehatan Mojokerto Branch. Research Metodes: The research design used is correlation analytic with a cross sectional approach. Results: The results of the study showing the knowledge of JKN- KIS participants about the SIPP application at BPJS Kesehatan Mojokerto Branch showed that most of them had less knowledge. Most of the JKN-KIS Participants motivation regarding the SIPP application has weak motivation. Submitting of complaints JKN-KIS participants through the SIPP Application mostly make minor complaints. Conclusion: There is a relationship between the knowledge and motivation of JKN-KIS participants with submitting of complaints in BPJS Kesehatan Mojokerto Branch. Keywords: Knowledge; Motivation; Submitting of Complaints Through the SIPP Application.