Disclosure of social, environmental, and governance (ESG) information is inherent to the implementation of a corporate social responsibility (CSR) strategy. Furthermore, the level of quality in sustainability reports that are developed by the company may enhance its credibility and in turn, influence the perception of stakeholders improving corporate reputation. The aim of this work is to test whether the quality of sustainability reports influences subsequent corporate reputation. This contribution responds to a latent need in the literature as the study of the assurance on sustainability reporting is relatively new and its focus is novel since few studies examine the level of quality information as a precedent of reputation instead of a result of certain corporate variables. Using a logistic regression applied to Ibex35 companies for the period 2006–2011, we find that the quality of sustainability reporting increases the likelihood of having higher corporate reputation. Copyright © 2017 John Wiley & Sons, Ltd and ERP Environment