Many surfaces encountered in colloid science are formed by the adsorption of surfactants or polymers on solid surfaces. Due to the formation of surface aggregates, the charge distributions of such surfaces may be nonuniform. Furthermore, these surfaces are expected to have regions with different electrostatic properties due to the presence of two or more different materials. In this paper, we propose a model consisting of periodically alternating regions of constant potential and constant charge, in order to account for the possibility of different regions on the surface possessing different electrostatic properties. Specifically, we consider the behavior of the far field effective electrostatic potential of this model surface when it is immersed in an electrolyte, i.e., the potential associated with the asymptotic exponential tail of the potential distribution in the electrolyte, In doing so, we find the previously unreported phenomenon that the effective potential is strongly dependent on the surface morphology and its associated length scale. Furthermore, we find that there also exists the possibility that the constant charge regions will be "invisible" to the potential distribution. These results have direct implications for general nonuniform charge regulating surfaces.