Da (im)possibilidade de um tratamento principiológico do enriquecimento sem causa no Brasil

This article has as objective to verify unsystematic approach of unjustified enrichment in the national courts, that is brought sometimes as a principle capable of drawing justice and equity criteria. Based on a deductive method, it will be made the analysis from the unjustified enrichment consolidation and its structure in Brazil to its historical evolution, moving away from the principologic application of the unjustified enrichment in the conclusion, because it is part of law of obligation based on cause abstraction.