Resistivity studies on amorphous Fe-Mn-PBAl system show ρmin at temperatures in the range 100-255 K. It is found that ρ(T)-1 [dρ(T)/dT] depends linearly on ρ(T) below Tmin, thus giving a simple exponential T-dependence for the dominant contribution to ρ below Tmin. This behaviour is also observed in several other amorphous systems studied by us