  In type II seesaw model of neutrino mass generation, we study a remarkable
signal of same-sign tetra-lepton (SS4L) signal at the Large hadron collider.
When doubly charged Higgs is lightest, the heavier singly charged or neutral
Higgs boson produces a doubly charged Higgs boson through its fast gauge decay.
This leads to a novel signature of same-sign tetra-leptons resulting from a
pair production of same-sign doubly charged Higgs bosons. We study production
cross section for the SS4L signal in parameter space of the mass splitting
among triplet components and the triplet vacuum expectation value at the LHC.
