Cross-border Service of Documents via Social Media “Notifications” in Global and EU Private International Law

I. Introduction and Scope of Investigation; II. From “Paper” to “Digital” – The Quest for Service of Documents via Email; A. On the Applicability of the Relevant Legal Framework – The Issue of an Addressee with an “Unknown” Domicile in the Context of New Service Methods; B. “Postal Services” and “Emails” under the 1965 Hague Service of; Documents Convention – Approaches in State Practice; C. Article 15 Hague Service of Documents Convention and the Validity of Service via Email According to the Law of the State Addressed for the Service; D. “Postal Services” and “Emails” in the Latest EU Service of Documents Regulation Recast; III. Social Media “Notifications” as Electronic Means for Service – A Future already Past?; IV. Recourse to Social Media Notification as a Means of Service and Free Movement of Decisions; A. National Rules on Recognition and Enforcement; B. EU Rules on Recognition – The Interplay between the Brussels I bis Regulation and the Service of Documents Recast Regulation; V. Conclusions – The Normative Impact of Foreign Service of Documents via Social Media in Future Supranational Legislation.