  It was shown recently by I. Horvath that lattice fermions obeying the
standard form of the Ginsparg-Wilson relation cannot be ultralocal. However,
there are more general forms of the Ginsparg-Wilson relation, which also
guarantee the physical properties related to chirality, but which are not
covered by Horvath's consideration. Here we present a proof which applies to
all Ginsparg-Wilson fermions, demonstrating that they can only be local in the
sense of an exponential decay of their couplings, but not ultralocal.
