  We examine some flavor changing processes such as rare leptonic decays of the
long-lived neutral kaon, muon-electron conversion in nuclei and radiative muon
decay which are induced by the combined effects of bilinear and trilinear
R-parity violations. These processes are used to put strong constraints on
certain products of the bilinear and trilinear couplings. We also discuss the
constraints on R-parity violation from neutrino masses and compare them with
the constraints from flavor changing decay processes. Large range of parameter
space satisfying the constraints from neutrino masses can be excluded by the
flavor changing processes considered in this paper, and also vice versa.
