Who should prove the existence or nonexistence of some fact in a judicial proceeding? Should the Claimant help the Defendant to prove asserts of truth of particular facts or vice versa? Is there a new rule within all the rules governing the presentation of facts and proof in proceedings before courts? Those are issues of a great importance studied by scholars and courts in the last years relating to the law of evidence and this essay which provides a framework for further research gives a particularly and critic point of view influenced by a vision of the process as an instrument of freedom or as a right that point to protect freedoms.