The support system for green electricity in the Netherlands has been one of the most complex and complicated systems across Europe. A voluntary trade of green certificates-or green labels-was one of the schemes used in the policy models of the 1990s. The liberalization of the electricity market has attracted substantial changes in the degree and nature of commitment by energy companies and political authorities for renewable electricity. In 2001, a new mechanism for the voluntary trade of green certificates has become operational, replacing the green label trade system one terminated in the end of 2000. This paper presents the two systems of green certificates' trade developed in the Netherlands and discusses their market stimulation potential in the very different economic and industrial circumstances that has surrounded each of them. The paper argues for a need to enable a support system that reduces investment risks as much as possible, and removes the residual, but still strong, institutional, administrative and social barriers for renewables' deployment. But before this, a clear governmental vision on the role of renewables in current energy supply systems is first needed, backed by a coherent policy and sufficient support along the economic dimension of renewables' market diffusion.