With the opening of the bankruptcy and pre-bankruptcy proceedings, there is a change of the legal position of the debitor and the creditor's right to the debtor. The key objective of the above-mentioned insolvency proceedings is the bulk settlement of the creditors by respecting the principle in concorsu condicio omnium creditorum par est. A necessary precondition for compliance with this principle is the lawful and correct determination of the creditor's claims. In order to be able to examine the claims at all, the creditors report them, in the bankruptcy proceedings to the bankruptcy trustee, in the pre-bankruptcy proceeding to Financial Agency. The bankruptcy law recognizes the situation in which the claim is considered to be reported, but it still must be recorded or on a proposal to open a pre- bankruptcy proceeding in the pre-bankruptcy proceeding, or in the bankruptcy trustee's (employee's claims) receipts lists. Creditors claims can be determined (and exercised) only within the borders of the bankruptcy proceedings, by first examining them at the examination hearing. After the completion of the same, the court issues a decision on recognized and disputed claims. It should be emphasized that at the examination hearing itself the court does not determine the merits of the creditor's claims, but tells the creditors to prove the merits of their claims in a lawsuit. Exceptionally, if the creditor has an enforceable document, the court will advise the appellant to a lawsuit to prove the merits of his disputes. If the party does not initiate a lawsuit until the expiration of the dilatory date, it is considered as having waived its claim. By entering the European Union, the regulation on bankruptcy proceedings became a part of the Croatian legal system. The mentioned Regulation imposes of on the bodies of bankruptcy proceeding additional obligations in their relation to creditors of other member states, from which, the aspect of the determination of claims, the most urgent obligation is to inform foreign creditors about the fact of opening a bankruptcy proceeding what places the domestic creditors in a less favorable position.