ABSTRACT – The application of the principle of good faith to administrative law has led to the need to protect the legitimate expectations of the citizen. The starting point for reflection arises from the frequent controversies concerning the compensation for damage caused by a favorable provision issued by P.A. and then declared illegitimate. By virtue of the new article 21 – nonies of the law n. 241/1990 it is necessary to think about the possible hypotheses of responsibility of the P.A. and on the legal nature of this responsibility.
KEYWORDS – Administrative provision, annulment, legitimate expectation, good faith, responsibility of the P.A.