ECJ Ruling Invalidates Mass Dismissals Due to Notification Errors

On October 30, 2025, the European Court of Justice (ECJ) delivered significant rulings regarding mass dismissals, known as “collective redundancies,” under European Union law. The court determined that technical errors or failures to meet notification requirements invalidate these dismissals. This decision underscores the strict obligations placed on employers, even during insolvency, to follow proper notification and consultation processes before implementing mass layoffs.

Clarifying Legal Obligations for Employers

The ECJ’s decisions stem from two cases in Germany that tested the application of EU Directive 98/59/EC, which governs collective redundancies. In both instances, the court found that inadequate or incomplete notifications to the relevant public authorities rendered the dismissals invalid. Specifically, the ECJ ruled that employers must adhere to mass dismissal notification and consultation requirements before proceeding with any layoffs and cannot later rectify any noncompliance.

According to Directive 98/59/EC, employers must notify the competent public authority of any planned mass dismissals at least thirty days prior to the layoffs taking effect. This “standstill” period allows for potential solutions to be explored, aiming to reduce the impact on affected employees.

In the first case, known as C-134/24 Tomann, the employer did not notify the relevant employment agency before dismissing employees. The second case, C-402/24 Sewel, involved an insolvency administrator who submitted a mass dismissal notification that lacked essential details, such as final statements from the works council and information on the consultation stage, as mandated by German law.

Implications for Employers Across the EU

The implications of these rulings are far-reaching for employers across the European Union. The ECJ’s decisions reinforce the necessity for compliance with both national laws and the EU Directive 98/59/EC when planning mass layoffs. Importantly, the court clarified that any failure to comply with these notification and consultation requirements leads to the automatic invalidity of dismissals, eliminating the possibility of retrospective correction.

The rulings impact all EU member states, as each country has incorporated Directive 98/59/EC into its local legislation. This includes specific thresholds for when mass dismissal notifications must be filed and detailed procedures for compliance.

While neither German law nor the EU Directive imposes penalties for noncompliance in notification, these recent rulings elevate the importance of meticulous adherence to legal requirements in the context of collective redundancies. Employers must ensure that they are fully informed of and compliant with these obligations to avoid jeopardizing their dismissal processes.

As businesses navigate the complexities of workforce reductions, the ECJ’s rulings serve as a critical reminder of the legal landscape surrounding mass dismissals in the European Union.