In this paper, we present a relatively new technique that can give informations on surface and subsurface metallic defects, i.e. the Hot Tip ThermoElectric Power (HTTEP) measurement. We show that depending on the size of the tip, different metallic inclusions in size and depth can be detected. We develop a numerical simulation based on the resolution of the transport equation in order to test the viability of the technique. We discuss the influence of the nature, the size and the depth of the inclusions on the measured TEP. The simulations results are compared with HTTEP measurement obtained on artificial metallic defects in samples. We show that by choosing judiciously the size of the tip, surface and subsurface metallic inclusions can be detected.