As the most generous country, Indonesia embedded altruism as their lifestyle. However, the donation that is often made conventionally now has been shifted to online donation. Online donation platform such as Kitabisa.com has significant users growths in recent years. Along with the increasing number of online donations, many fraud cases occurred which harm users' trust in online donation platforms. Thus, this study aims to examine the institutional mechanism and information systems success factors that influence trust and distrust in the online donation platform and how it influences attitude and online donation intention. We collected 865 data using an online survey and then analyzed it using Partial Least Square - Structural Equation Modeling (PLS-SEM). The result of this study indicates that quality aspects such as system quality, information quality, and institutional mechanism aspects such as perceived platform rules and perceived monitoring influence trust and distrust in online donation platforms. Additionally, trust and distrust in online donation platforms influence attitude towards donation and online donation intention significantly.