  We study the associated production of selectrons and neutralinos with
subsequent leptonic decay of the selectron in e\gamma scattering within the
framework of MSSM and NMSSM. Due to the weak couplings of singlino dominated
neutralinos, associated neutralino production e^+ + e^- -> neutralino_1 +
neutralino_2 at a linear collider can be strongly suppressed in some regions of
the parameter space. Then the process e + gamma -> selectron_{L/R} +
neutralino_{1/2} -> e + neutralino_{1/2} + neutralino_1 can give additional
informations on the underlying theory and the character of neutralino_1 and
neutralino_2.
