The subject of this final thesis is to show the contracting authorities' obligations concerning the publication of notices in public procurement procedures, prescribed by the legislative framework of the Republic of Croatia, harmonised with the acquis of European Union. First part of this paper will show the legal framework of public procurement, the primary and secondary EU legal framework, legislative and institutional framework of the Republic of Croatia, principles of public procurement, and contracting authorities' obligations provided by the Public Procurement Act, effective from January 1st, 2107., with the regard to publications in public procurement procedures via The Electronic Public Procurement Classifieds of the Republic of Croatia. First part will also introduce the obligations of publishing in the procedure of concession granting as well as obligations of publishing in the procedures of proposing and approving project proposition for public-private partnerships. Second part of this paper will show the obligations of contracting authorities which are not in the system of The Electronic Public Procurement Classifieds of the Republic of Croatia, also with the results of a research conducted on the websites of local self-government units in the area of the Virovitičko - podravska county related to the obligations of contracting authorities to publish the budget acts, general acts which regulates the procedures of simple procurement, public procurement plans, the statements and the lists of economic operators connected with contracting authorities' representatives or persons related to them in a conflict of interest, and publishing the registry of public contracts and framework agreements. This final paper's intention is to point out the exceptional importance of publishing in public procurement procedures, concerning the transparency of procedures and implementing the public procurement's establishing principles.