A high-profile EU court case on pseudonymised data has ended without a final ruling. The dispute involved the Single Resolution Board and the European Data Protection Supervisor.

The case focused on whether pseudonymised opinions qualify as personal data under the GDPR. Judges were also asked to assess reidentification risks and notification duties.

After intervention by the Court of Justice of the European Union, the matter returned to the General Court. Both parties later withdrew the case, leaving no binding judgement.

Legal experts say the CJEU's guidance continues to shape enforcement practice. Regulators are expected to reflect those principles in updated EU pseudonymisation guidelines.