Structural equation modelling is a statistical technique widely used in Information Systems research. This systematic review examines how PLS-SEM has been applied in disclosure and privacy studies on social network sites. Based on 21 papers published between 2006 and 2022 and analysed using PRISMA 2020, the review covers data characteristics, reasons for using PLS-SEM, evaluation of measurement models, evaluation of structural models and reporting best practices. It proposes guidelines for using PLS-SEM in behavioural information security research and related fields.