As contemplated by the Rome Statute of the International Criminal Court (‘Court’), the United Nations and the Court entered into a Relationship Agreement in 2004. The Relationship Agreement provides a framework for cooperation between the United Nations and the Court, including through logistical or administrative support to the Court, in particular in countries where the Prosecutor has opened investigations or is conducting preliminary examinations. The United Nations also provides substantive support and judicial assistance to the Court’s organs, in particular to the Prosecutor, but also increasingly now to the Defence, by making available documents and information generated or obtained by the United Nations and its various field presences. United Nations staff and experts have also been made available to the Court for interview and some have testified before the Court, for which the United Nations Secretary-General has to waive their immunity. This commentary provides an update on recent developments in two areas of cooperation between the United Nations and the court: information sharing, and contact with persons subject to warrants or summonses.