ABSTRACT. Of the many ethical corporate marketing practices, many firms use corporate social responsibility (CSR) communication to enhance their corporate image. Yet consumers, overwhelmed by these more or less well-founded CSR claims often have trouble identifying truly responsible firms. This confusion encourages "greenwashing" and may make CSR initiatives less effective. On the basis of attribution theory, this study investigates the role of independent sustainability ratings on consumers' responses to companies' CSR communication. Experimental results indicate the negative effect of a poor sustainability rating for corporate brand evaluations in the case of CSR communication, because consumers infer less intrinsic motives by the brand. Sustainability ratings thus could act to deter "greenwashing" and encourage virtuous firms to persevere in their CSR practices.

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International audienceThis paper examines the ‘executional greenwashing’ effect, defined as the use of nature-evoking elements in advertisements to artificially enhance a brand's ecological image. Using classic models of information processing and persuasion, the research tests whether ‘executional greenwashing’ differs as a function of consumer knowledge about environmental issues in the product category and whether environmental performance information can counterbalance the effect by helping consumers form an accurate evaluation of the brand's ecological image. Three experiments with French consumers reveal that evoking nature does mislead consumers in their evaluation of a brand's ecological image, especially if they have low knowledge of environmental issues. Two indicators of environmental performance, based on current international policies, are tested to counteract ‘executional greenwashing’. Whereas a raw figure is not sufficient to help non-expert consumers revise their judgment, accompanying the figure with a traffic-light label eliminates ‘executional greenwashing’ amongst both experts and non-experts. Theoretical and regulatory implications are discussed

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