  Nonequilibrium physics of random events, or fluctuations, is a unique
fingerprint of a given system. Here we demonstrate that in noninteracting
systems, whose dynamics is driven by Majorana states, the effective charge
$e^*$, characterizing the electric current fluctuations, is fractional. This is
in contrast to noninteracting Dirac systems with the trivial electronic charge,
$e^*=e$. Quite the opposite, in the Majorana state we predict two different
fractional effective charges at low and high energies, $e^*_l=e/2$ and
$e^*_h=3e/2$, accessible at low and high bias voltages, respectively. We show
that while the low energy effective charge $e^*_l$ is sensitive to thermal
fluctuations of the current, the high energy effective charge $e^*_h$ is robust
against thermal noise. A unique fluctuation signature of Majorana fermions is,
therefore, encoded in the high voltage tails of the electric current noise
easily accessible in experiments on strongly nonequilibrium systems even at
high temperatures.
