Another success of the Baran Książek Bigaj Law Firm. On the 17th of October 2019, the Supreme Administrative Court adjudged that, contrary to the existing line of jurisdiction of Voivodeship Administrative Courts and Common Courts, parties to proceedings in social security cases are not deprived of the possibility to challenge the decisions of the Social Security Office (referring to the previously issued decision) under administrative procedure, i.e. before administrative courts. The judgment concerned the possibility to challenge a decision on the revision of a decision of the Social Security Office that was issued in court proceedings connected with the appeal against the decision to be corrected. This view may analogically apply to all decisions that the Social Security Office may issue after issuing the decision.