  After a summary of the motivations for searching flavour violating decays and
electric dipole moments in the leptonic sector, I briefly sketch the present
status of the limits on lepton-slepton misalignement and discuss the
potentialities of the planned experimental improvements. Candidates for
theories beyond the Standard Model have to satisfy all these experimental
constraints; I will discuss in particular how the supersymmetric SM extended
with the see-saw faces the flavour problem.
