The Right to an Explanation in Practice: Insights from Case Law for the GDPR and the AI Act

The right to an explanation under the GDPR has been much discussed in legal-doctrinal scholarship. This paper expands upon this academic discourse, by providing insights into what questions the application of the right to an explanation has raised in legal practice. By looking at cases brought before various judicial bodies and data protection authorities across the European Union, we discuss questions regarding the scope, content, and balancing exercise of the right to an explanation. We argue, moreover, that these questions also raise important interpretative issues regarding the right to an explanation under the AI Act. Similar to the GDPR, the AI Act's right to an explanation leaves many legal questions unanswered. Therefore, the insights from the already established case law under the GDPR, can help us to understand better how the AI Act's right to an explanation should be understood in practice.