CHAPTER IV: OTHER FORMS OF COOPERATION
SECTION II: SPECIFIC FORMS OF COOPERATION
Art. 36 Service of records
The Court may serve its decisions and other records or documents upon recipients in Switzerland directly by mail.
Art. 37 Summons
1 A summons to appear before the Court as a witness or expert shall be accompanied by
the Rule of Procedure and Evidence of the Court on self-incrimination. The Rule shall be
given to the person in a language that the person understands.
2 The person summoned is under no obligation to comply with the summons. If so requested, the Central Authority shall obtain written assurances from the Court guaranteeing the safe-conduct of the witness or expert.
Service of documents - national procedures for ICC proceedings
Facilitating voluntary appearance of persons - national procedures for ICC proceedings
EDIT.