With the intention of achieving a Common European Asylum System, a mechanism determining responsible Member State in the field of international protection had to be established at supranational level. The key for distribution of applicants for international protection is institutionalised in the Dublin Regulation, which establishes a hierarchy of criteria that specifiy the responsible Member State to decide on the merits of the case regarding international protection, in a way that a single Member State has the authority to decide about an individual application. Abiding by the standard, it primarily seeks to secure family unity and the principle of the best interest of the child. Secondary it strives to assure responsibility of a Member State, which issued the applicants' residence documents or visa, and, ultimately, the assessment of the criterion of illegal entry to an EU Member State from a third country, which is most commonly used in practice. Whenever it can not be determined which Member State has the responsibility considering stated criteria, the responsibility lies in the hands of the Member State in which the applicant proposed for international protection for the first time. The Dublin system specifies the procedure for determining the responsible Member State and the extradition of the applicant, in relation to which extensive case law of the ECHR and CJEU was established. The main goals of the Dublin system were to ensure quick access to international protection and to prevent the occurrence of the phenomenon of secondary movement and asylum shopping, which did not realize. The mechanism is therefore inefficient and has a negative impact on the protection of applicants for the international protection and respect of international and EU standards, additionally it creates a disproportionate distribution of responsibility among EU Member States. The relocation mechanism was established as the main alternative to the Dublin system, but it represents only an ad hoc solution. Systemic imperfections of the system have been largely demonstrated especially by the increased migration flow in the EU in the year 2015, with which the EU is still confronting today.