  Revisiting a path-integral procedure of recovering gauge invariance from
anomalous effective actions developed by Harada and Tsutsui, it is shown that
there are two ways to achieve gauge symmetry: one already presented by the
authors, which is shown to preserve the anomaly in the sense of standard
conservation law, and another one which is anomaly-free, preserving current
conservation. It is also shown that the aplication of Harada-Tsutsui technique
to other models which are not anomalous but do not exhibit gauge invariance
allows the identification of the gauge invariant formulation of the Proca
model, also done by the referred authors, with the Stueckelberg model, leading
to the interpretation of the gauge invariant map as a generalization of the
Stueckelberg mechanism.
