  Flavour physics is a priceless window on physics beyond the Standard Model.
In particular, flavour violation in the lepton sector looks very promising, as
high precision measurements are prospected in future experiments investigating
on $\mu\rightarrow e$ conversion in atomic nuclei: the predictions for this
observable are analysed in the context of the type I Seesaw mechanism.
Furthermore, new ideas to explain the Flavour Puzzle recently appeared, mainly
based on a possible dynamical origin of the Yukawa couplings and on flavour
symmetries. The focus of this proceeding will be set on the Minimal Flavour
Violation ansatz and on the role of the neutrino Majorana character: when an
$O(2)_{N}$ flavour symmetry acts on the right-handed neutrino sector, the
minimum of the scalar potential allows for large mixing angles -in contrast to
the simplest quark case- and predicts a maximal Majorana phase. This leads to a
strong correlation between neutrino mass hierarchy and mixing pattern.
