  We study CP asymmetries in lepton-number violating two-body scattering
processes and show how they are related to CP asymmetries in the decays of
intermediate massive Majorana neutrinos. Self-energy corrections, which do not
contribute to CP asymmetries in two-body processes, induce CP violating
couplings of the intermediate Majorana neutrinos to lepton-Higgs states. We
briefly comment on the implications of these results for applications at finite
temperature.
