  We present several results on memory effects, asymptotic symmetry and soft
theorems in massive QED. We first clarify in what sense the memory effects are
interpreted as the charge conservation of the large gauge transformations, and
derive the leading and subleading memory effects in classical electromagnetism.
We also show that the sub-subleading charges are not conserved without
including contributions from the spacelike infinity. Next, we study QED in the
BRST formalism and show that parts of large gauge transformations are physical
symmetries by justifying that they are not gauge redundancies. Finally, we
obtain the expression of charges associated with the subleading soft photon
theorem in massive scalar QED.
