  In this note we shortly comment on our analytical results in
PRD73(2006)055003 for the $Z$ boson one-loop form factors contributing to the
Lepton Flavour Violating $Z$ penguin diagrams in SUSY. In a recent
communication [arXiv:1312.5318v1] it has been pointed out a mistake in our
formulas for the chargino contribution to the $Z$-form factor, $F_L^{(c)}$, and
these authors have included corrections to our results in a way that we do not
agree with. We wish to clarify here what are the correct results for these form
factors.
