  We study N=1 globally supersymmetric theories on runaway backgrounds arising
from scalar potentials with a slope characterized by a scale $M = |V/V'|$. We
find that, under mild assumptions, there always exists a massive goldstino in
the low energy effective theory. In the simplest models the effective mass of
such a fermion is of order $\sqrt{V} / M$, or of order $V / M^2 \mu$ when a
seesaw mechanism takes place, where $\mu$ is a scale that characterizes the
masses of other heavy fermions.
