  We compute the fermionic radiative contributions to the decay $H^+ \to
W^{+(*)} A^0$ in the framework of models with two Higgs doublets (2HDM), for
the case of an on-shell and off-shell W. We show that, in the majority of the
cases, current measurements of the $\rho$ parameter suggest $M_{H^{\pm}}\ge
M_A$ and such decays could invalidate current charged Higgs searches or aid
detection in the region $M_{H^{\pm}}\approx M_W$. We find that the radiative
corrections may approach 50% for small values of $\tan\beta$.
