We study under what conditions the Two‐Step moduli stabilization is a reliable description of the low energy effective action. We focus on a general class of models whose superpotential mimics the typical one describing supergravity theories from superstring compactifications with background fluxes. We find that the procedure is a reliable one as far as a mass hierarchy of order MS/MP, MS the supersymmetry breaking scale, is realized. This contribution is based on [1, 2].