  Electromagnetic form factors serve to explore the intrinsic structure of
nucleons and their strangeness partners. For the decay $\Sigma^0\to\Lambda
e^+e^-$, due to limited phase space, the effects caused by the Sigma-to-Lambda
transition form factors compete with the QED radiative corrections. These
corrections are addressed in the present work, evaluated beyond the soft-photon
approximation, i.e., over the whole range of the Dalitz plot and with no
restrictions on the energy of the radiative photon.
