Even though the COVID-19 pandemic has represented an intense period of stress and anxiety for individuals, it has also been an opportunity for firms to engage in cause-related marketing initiatives as a means of providing support and helping them cope with this global pandemic. This study analyzes the influence of cause–brand fit and cause–brand alliance on customer-based legitimacy and reputation. This study also examines the mediating and moderating roles of trust and betrayal, respectively. Data were collected from 455 participants during (...) the first wave of the pandemic, especially during the first lockdown. The results contribute to unveiling the economic and societal outcomes of cause-related marketing. The findings also enrich the antecedents of the legitimacy and reputation conferred by customers. (shrink)