  We investigate the potential of future TeV linear e^+e^- colliders to observe
singly-charged Higgs bosons ($H^\pm$) via the coupling $H^\pm W^\mp Z$, which
would signal the existence of exotic Higgs representations. In the context of a
Higgs-triplet model compatible with the electroweak oblique parameters, we
estimate the cross section for pro- ducing charged Higgs-triplet bosons that
couple predominantly to $W$ and $Z$ bosons in 0.5--2 TeV-$e^+e^-$ colliders.
The principal backgrounds are evaluated and the viability of the signal is
discussed and illustrated.
