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The doctrine of own acts that has several ways of formulating or expressing itself (venire contra factum proprium non valet, prohibition of acting against own acts and protection of legitimate expectations), as I notice in the investigation, is used indiscriminately in the solution of labor towards the worker and where the unavailability of their rights emanating from the norms of public order is privileged, which came to generate a jurisprudential and doctrinal debate among us , after having been raised with scientific rigor in countries of the Andean region and Europe. This legal rule cannot be applied or recognized absolutely in labor matters, because it would annihilate Labor Law, to whose defense this article is directed, which studies the basic aspects of the imported doctrine in order to propose its necessary delimitation in our environment.