This study aims to analyze and explain three variables, namely system quality, information quality, and user satisfaction. The effect of information quality as a mediation of system quality on user satisfaction of SINTAKDOMI Web-Based Applications at the Notary Office and PPAT Muhammad Haris Fathony, SH., M.Kn. In addition, this study also aims to analyze and explain the direct effect of system quality on the quality of information on the SINTAKDOMI Web-Based Application at the Notary Office and PPAT Muhammad Haris Fathony, SH., M.Kn. Respondents are employees and customers at the Notary Office and PPAT Muhammad Haris Fathony, SH., M.Kn as users of a Web- Based Application called SINTAKDOMI in the internal office area. The population in this study was 10 employees and 90 customers who used the SINTAKDOMI Web-Based Application. The data collection method used is a census using all analytical techniques using Linear Regression Techniques with path analysis methods. The results showed that the quality of information status is a mediating variable that can mediate the system quality variable on user satisfaction.