The everyday situations of business life and the experiences of the employees reflect in their attitudes and behaviours and create a base for the new studies. In particular, the psychological effects of the situations that emerge after the employees had signed the contract and started to work for a firm can cause them to lose their trust in the organisation and lead them to search for new job opportunities. Furthermore, the psychological effects can also negatively affect the operation of the organisations. Because, one of the main objectives of businesses is to achieve sustainability and it depends on the performances of the employees, as well as the profit to be used in productive investments. At the same time, if the qualified and specialized staff, who have been working for the organisation for many years, experience psychological violations and leave the organisation, this can cause significant loss of power and also loss of the investment in the development of the employees. In the increasingly competitive environment, the businesses should keep the employee turnover at minimum level and attract the talented employees in order to reach their long-term objectives. In the study, a survey was conducted on the white collar employees using 5-point Likert scale and the hypotheses were developed about the effects of psychological contract violations on the organizational trust and intention to leave and the data were analysed using SPSS 23 statistical program.