  We study the leptonic decays of a doubly charged Higgs bosons class which is
predicted by a model based on the SU(3)_C\otimesSU(2)_L\otimesU(1)_N
electroweak gauge symmetry. In contrast to other models, decays into taus are
largely dominant (99.5 % or more). Coupling of these scalars to two standard
charged gauge bosons are either zero or very suppressed. Couplings to two
different flavor of charged leptons do not occur. Some coupling features
imposed by symmetry and representation content lead to simple relationships
between decay rates and doubly charged Higgs masses. Some of the parameters
depend only on the decay widths and on the charged lepton masses. In order to
clarify the relevance of our results, some aspects of this model are compared
with the Higgs triplet model.
