EU JudgeCo Guideline 3 - Court-to-Court Communication

3.1. A court may communicate with another court in connection with matters relating to proceedings before it for the purposes of coordinating and harmonising proceedings before it with those in the other jurisdiction.

3.2. A court should obtain in advance the consent of all parties affected by these communications before  disclosing the information communicated in the meaning of EU JudgeCo Guideline 3.1.