PurposeThis study aims to investigate the moderating role of corporate social responsibility (CSR) commitment in the relationships between antecedents and outcomes of consumer situational scepticism towards luxury brands.Design/methodology/approachThe study used a questionnaire administered through a consumer panel, using established scales. A 2 (fictional, non-fictional) x 2 (low commitment, high commitment) factorial experimental design with four cells was implemented.FindingsThe results revealed that values-driven motives were associated with lower consumer situational scepticism, whereas egoistic-driven motives were linked to higher levels of consumer situational scepticism, regardless of the CSR commitment level of the luxury brand. However, the impact of strategic-driven motives and stakeholder-driven motives on consumer situational scepticism was only significant within the low commitment condition. Consumer situational scepticism was found to lead to lower brand resonance and resilience to negative information in both low and high commitment conditions.Originality/valueThis study contributes new knowledge by highlighting the crucial role of motives in shaping consumer perceptions, including scepticism, brand resonance and resilience to negative information, ultimately influencing consumer advocacy. The study further demonstrates that high commitment weakens the relationship between strategic-driven and stakeholder-driven motives and consumer scepticism. Moreover, high commitment also weakens the relationship between scepticism and the key outcomes examined in the study.