It is well known that the proper treatment of QED radiative corrections
at 
colliders constitutes the essential tool to proceed from
data taking to the physics analysis because of
their large effects on the measured observables. Generally, they depend upon
the details of the experiments via the cuts
applied to the final state particles and therefore
they need much attention for precision measurements.
Furthermore, the crucial role played by radiative effects in the production
of narrow states has been emphasized since long time [1].
For these reasons, our aim here is to provide a simple and general recipe
which can be used for the evaluation of QED corrections to
the cross sections of
leptonic and hadronic pair production in 
annihilations
over a realistic experimental set--up for DA
NE physics.
In particular this paper is devoted to discuss the basic issues of two
distinct subjects of interest for the experiments planned at the
--factory DA
NE: the electromagnetic radiative corrections to
collisions around the 
peak
and the process of (single) radiative Bhabha scattering
.
The formulation of 
processes
at 
is based on recent analyses [2,3] where a
semi--analytical and ``realistic'' (i.e.
including the effects of energy or invariant mass cuts, scattering
angle and acollinearity cuts) approach is described in detail and
successfully applied to fit electroweak precision data for cross sections
and asymmetries around the 
peak. In this sense, we will update
and generalize to more realistic set--up
the treatment of radiative corrections
summarized in the contribution [4] to the first edition of the
DA
NE Physics Handbook, providing also numerical results together with
an estimate of the associated theoretical uncertainty.
Radiative Bhabha scattering, which we will discuss next,
is relevant at DA
NE
because this process constitutes a very serious background for
physics experiments with tagging facilities. Precise
predictions are therefore mandatory and they require particular care
for the presence of extreme
(i.e. very forward) angular configurations in the planned tagging devices.
Previous analyses, and in particular very recent
analytical results, will be reviewed and compared with respect to their physics
input as well as their numerical results.