Me authors of this article give acomparative review of coaching session models that are based on the GROW model and they present their own elaborated plan of acoaching session, which can be used when working with clients. Mis model includes impor-tant factors that are essential in order to effectively change the initial situation of the client and to achieve the intended goals.

The article presents the original PERMA model of coaching. Theoretical bases of the model are outlined, i.e. the Authentic Happiness Theory, along with three models devised by Martin Seligman: the pleasant life, the good (committed) life and the meaningful life, as well as his well-being theory formulated later. Authors also refer to the concept of character strengths and virtues introduced by Christopher Peterson and Martin Seligman, and propose the application of the classification of character strengths and virtues VIA (Values in Action) in the coaching process based on the PERMA model.

The main objective of this article is to broaden the knowledge of professional coaches with certain aspects of clinical psychology. The focus is on those symptoms demonstrated by patients, which could be the early warning signs of mental illness or problems when psychiatric or psychological help is necessary. Professional Coaches have a responsibility to distinguish their services from therapy, because they are not legally sanctioned and not allowed to offer therapy. Coaching does not focus on dysfunction, diagnosis, symptoms or the past, and that is the reason, why these topics are not included in the curriculum preparing one for this profession. But an ethical coach should observe when a client needs a therapy instead of, or in addition to, coaching and will recommend accordingly. As well as a good therapist, could observe when a client is ready to take greater responsibility for their own life and recommend coaching. This article will argue the significance and importance of aforesaid awareness and expertise, which will allow professional coaches will be able to recognize whether a client would benefit from coaching or should seek guidance from other specialists. For this reason, in this article the Global Assessment of Functioning (GAF) is presented and discussed, as well as the characteristics behind the concept of psychological diagnosis.