  In models with large extra dimensions and TeV scale quantum gravity, small
(Dirac) neutrino masses can be obtained naturally if the right-handed neutrino
propagates in the extra dimensions. In this scenario, with 2 Higgs doublets, we
show that the decay of charged Higgs into {\em left-handed} charged lepton (say
\tau) and right-handed neutrino can be significantly enhanced, with O(1)
branching ratio, due to the large number of Kaluza-Klein states of the
right-handed neutrino. Since \tau's from the standard decay of charged Higgs
are {\em right-handed}, the above novel charged Higgs decay can provide a
distinctive signature of these models at hadron/lepton colliders. Similarly,
top quark decays to b \mu^+ \nu, b \tau^+ \nu through virtual charged Higgs can
be enhanced.
