A validated questionnaire regarding patient satisfaction with psychological services is reported. There is a German and an Italian version, with a total sample size of 655 persons. Based on satisfaction criteria generated by the patients themselves, a preliminary version and consecutively the final version, computed according to psychometric criteria, were developed. Internal consistency complied with scientific requirements (Cronbach alpha=0.95 and 0.96, respectively). The outcome was a one-dimensional satisfaction factor, empirically subdivided into "relationship" and "treatment outcome". Main indication of the questionnaire is the demonstration of process quality. There are also preliminary results with respect to congruence validity.