  We study the gauge boson propagator in the dual Abelian Higgs theory which
confines electric charges. The confinement is due to dual
Abrikosov-Nielsen-Olesen strings. We show that the infrared double pole
1/(p^2)^2 in the propagator is absent due to the confinement phenomenon.
Instead, specific angular singularities signal the eventual set in of the
confinement. These angular singularities are a manifestation of the confining
strings.
