The annexation, i.e. the amendment of the provisions of the employment contract is a frequently present legal institute in the labor practices of employers in the Republic of Serbia. Such changes to the employment contract are usually made when there are changes in the organization of the work process, which causes a change in the description of the employee’s position or even the competent position where the employee will perform his work. Also, this institute has its application when changing any of the provisions of the valid employment contract of the employee, so by applying this institute, the employer can change the amount of the employee’s salary, the employee’s working hours, the employee’s place of work and any other element that is important for the employer and employee.

On the other hand, what is of special importance for employees is that the employer cannot completely change the contracted working conditions depending on his free will, so in case employees think that their labor rights have been violated by the annex offered to them, they can, in order to save their employment, sign the proposed annex, but then challenge its legality before the competent court.

What is important for employers is that when changing the provisions of the employment contract, they must comply with the legal procedure, which is reflected in the obligation to submit a notification of the reasons for changing the agreed working conditions before submitting the annex to the employment contract for the employee’s signature, which notification must contain the notification on the legal consequences of accepting or rejecting the offered annex.