  We define a perturbative S-matrix in a local patch of de Sitter background in
the limit when the curvature length scale ($\ell$) is large and study the
'soft' behavior of the scalar QED amplitudes in de Sitter spacetime in generic
dimensions. We obtain the leading and subleading perturbative corrections to
flat space soft photon theorems in the large $\ell$ limit, and comment on the
universality of these corrections. We compare our results with the
electromagnetic memory tails obtained earlier in $d=4$ using classical
radiation analysis.
