The negotium is the probative force attached to the content of a legal act. In the context of such an act, it is necessary to distinguish:
In matters of authentic instrument, according to the saying "scripta publica probant se ipsa", the instrumentum is indisputable when a public officer establishes the act in accordance with the law, in the context of a specific competence except for forgery. On the other hand, for these same authentic acts, the probative force of the negotium depends on the content concerned.
It is then necessary to distinguish, as regards the negotium, three possible types of statements, of unequal probabilities: change the code
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