  We ask whether soft photons, defined by asymptotic charges, can have
consequences for the outcome of localised quantum processes. We consider a
spatially localised two-state system, at rest in flat spacetime, coupled to a
$U(1)$ gauge invariant charged scalar field. We find that the system's
de-excitation rate does depend on the soft charges that correspond to the
radial component of the electric field dressing at the asymptotic infinity; the
excitation rate, by contrast, remains zero, regardless of the soft charges.
Some implications are discussed.
