res inter alios acta

Res inter alios acta (lat. things done between third parties ) is in the law a principle of the Treaty of Rome doctrine that the actions of others is not relevant in a legal relationship between two parties, they can neither commit nor entitle the parties. Later, this principle is of general application gained in all areas of law and is ultimately a manifestation of the methodology relative legal relations both in civil and in common areas.

In terms of processes, this principle is mapped to the proof ban on the actions of others. Res inter alios acta as a term means, therefore, often only the evidence ban.

In the modern jurisprudence of this legal rule has been restricted on one side to the effect that as a third- sided commitment is still not possible, or only sovereign, a permission is permitted. → Contract to the detriment of third parties, the contract in favor of third parties, contract with protective effect for third parties.

Derivative: Socii mei socius ( non est meus socius ) - The shareholders of my partner ( not my partner).

International law

In international relations, this principle of law has meaning in terms of the principle of sovereignty. It follows, first, that all subjects of international law are the same, and among them no greater rights or obligations than others. But essential parts of international law based on a long practice continuity for legal reasons and have condensed into customary international law. This may happen particularistic or general ( universal). The problem is therefore how the actions of a majority can bind individual subjects ( universal law ), if they have remained uninvolved, and how it behaves when such principles are deemed so important are that they should be contractually irrevocable (jus cogens ).