The article deals with issues related to the legal standing to file a claim for restitution of expropriated real estate and the subject-related limits of an administrative case initiated by this claim. The considerations focus on the procedural obligations of the authority conducting the proceedings, as well as on the relationship between the co-participants in the proceedings where there is more than one subject entitled to restitution. The analysis of the subject-related aspect of restitution of expropriated real estate also requires reference to the previously applicable legal provisions. As the law currently stands, restitution claims related to a single real estate may be filed separately and in different configurations of subjects. However, in the light of the findings made in this article, this does not imply there will be multiple administrative cases. There is always a single case, and its legal existence and boundaries are determined until the expiry of the three-month period, counted from the date of the competent authority’s notification of its intention to use all or part of the expropriated property for a purpose other than that specified in the expropriation decision. At that moment – depending on the will and activity of the previous owners or their heirs – it either ceases to exist in the legal space or, within the limits finally determined, becomes the subject of a single set of administrative proceedings aimed at issuing a decision on the merits. If more than one claim is made, these proceedings are conducted with substantive co-participation of the parties.