Production of neutralinos in cascade decays of selectrons with subsequent three-body leptonic neutralino decays is discussed. It is shown that a high degree of polarization of such neutralinos and possibility of reconstructing their rest frames could provide new tools to verify the Majorana nature of neutralinos and to measure the CP violation in the neutralino sector of the MSSM.

PACS numbers: 12.60.Jv, 14.80.Ly