  We study the influence of disorder on the vortex charge, both due to random
pinning of the vortices and due to scattering off non-magnetic impurities. In
the case when there are no impurities present, but the vortices are randomly
distributed, the effect is very small, except when two or more vortices are
close by. When impurities are present, they have a noticeable effect on the
vortex charge. This, together with the effect of temperature, changes
appreciably the vortex charge. In the case of an attractive impurity potential
the sign of the charge naturally changes.
