Contemporary international relations have resulted not only in the establishment of intergovernmental organizations (‘IGOs’), but also in the emergence of certain IGO-like entities which are entering into ‘diplomatic-like’ relations with states, characterised by privileges and immunities similar to those provided under classic diplomatic law. This paper analyses such diplomatic-like relations between states and a number of these IGO-like entities primarily in relation to so-called ‘trans-governmental organizations’ (‘TGOs)’. In addition, organizations composed of formally non-state entities, but with an undoubtedly public purpose, such as the International Committee of the Red Cross (‘ICRC’) or the International Federation of Red Cross and Red Crescent Societies (‘IFRC’), as well as other so-called ‘advanced’ non-governmental organizations (‘NGOs’), will also be discussed due to their participation in legally regulated international, diplomatic-like relations with states and IGOs.

当代国际关系不仅导致建立了政府间组织（“ IGO s”），而且还导致了某些类似IGO的实体的出现，这些实体与国家建立了“类似外交的”关系，其特点是特权和豁免类似。适用于经典外交法规定的法律。本文主要是与所谓的“跨政府组织”（TGO s）相关的国家和许多此类IGO实体之间的这种类似外交的关系进行分析。此外，由正式的非国家实体组成但无疑具有公共目的的组织，例如红十字国际委员会（' ICRC”）或红十字会与红新月会国际联合会（IFRC）以及其他所谓的“高级”非政府组织（NGO），也将因其合法参与而进行讨论与国家和政府间组织规范的国际外交关系。