  The electromagnetic transition form factors (TFFs) of the nucleon provide
important information on the internal structure of hadrons. A model-independent
dispersive calculation of the electromagnetic TFFs $N^{*}(1520)\to N$ at low
energies is presented. Taking pion rescattering into consideration, we derived
dispersive relations for the $N^{*}(1520)\to N$ TFFs that relate space-like and
time-like regions from the first principles. Based on the space-like data from
JLab and hadronic data measured by HADES, we make predictions for TFFs in the
time-like region. Our predictions can be tested in future experiments (e.g.
HADES).
