Foreign Research Permit – Online Application (FRP – OA) is an information system utilized by the Ministry of Research and Technology to help foreign researchers to obtain research permit . This system was officially announced in July 4, 2011 and has been used since then. In the information page provided, the Foreign Research Permit Division as the administrator of this system stated that this system is the only way to obtain research permit since January 4, 2012 or six months from the official date announcement. Unfortunately, there were still many foreign researchers who did not utilize this system and prefer to send all of required documents by email, facsimile, or courier service in 2014. This research is focused to understand factors that affect the sustainability of the utilization of FRP – OA by foreign researchers as end users. The model used in this research is the combination of Expectation Confirmation Model – Information Technology (ECM-IT), IS Success Model and by adding interaction and security/privacy variables. Data collection was conducted by sending invitation to fill out questionnaire to all FRP – OA’s users with the amount of 524 users via online questionnaire. This research acquired 119 responses from 524 questionnaires sent to the FRP – OA’s users. The data collected were analyzed using Partial Least Square (PLS). The result of the research indicates that information quality, interaction, security/privacy, and system quality are factors that affect the continuity to use the FRP – OA. Based on these results, the FRP Division could focus on improving the FRP – OA by considering four factors that affect foreign researchers to continue using the FRP – OA.