The first international treaty condemning mass expulsions was a document issued by the Council of Europe on 16 September 1963, Protocol No 4 to the Convention for the Protection of Human Rights and Fundamental Freedoms Securing Certain Rights and Freedoms Other than Those Already Included in the Convention and in the First Protocol, stating in Article 4: "collective expulsion of aliens is prohibited."
Den første internationale traktat, som fordømte massedeportationer var et dokument udsendt af Europarådet den 16. september 1963 med titlen: Protocol No 4 to the Convention for the Protection of Human Rights and Fundamental Freedoms Securing Certain Rights and Freedoms Other than Those Already Included in the Convention and in the First Protocol, hvor der i artikel 4 står: "collective expulsion of aliens is prohibited" (kollektiv udvisning af individer er forbudt).