This paper focuses on analysing the institution of the interim injunction securing a claim for declaring the notice of termination of an employment relationship ineffective or a claim for reinstatement. In specific, the following questions have been analysed: conditions for granting the injunction, the issue of serving and enforcing the court's order granting the interim injunction and the possibility of terminating the employment relationship while the interim injunction is valid. In addition, the paper provides an answer to the question of whether an employee who has been granted the interim injunction may effectively claim for remuneration for the entire period of unemployment. The paper also refers to the specifics of the fixed-term employment contract when applying the interim injunction, as well as provides an analysis of a case in which an employer refuses to accept back an employee who has been granted the interim injunction from the perspective of the penal law.