The OWP conducts direct action, such as a demonstration "against the defamation of the Polish Nation" at the Jewish Historical Institute in Warsaw (June 26, 2009) and humanitarian aid for Serbs in Kosovo (May 2011). From the beginning, it has supported the idea of the March for Independence. At the invitation of the OWP, delegations from Slovakia, Serbia and USOPAL attended the march as well. The OWP regularly takes part in actions focused on the support for the Serbian Kosovo. It fights against the glorification of genocide perpetrators, members of the Ukrainian Insurgent Army (Massacres of Poles in Volhynia and Eastern Galicia 1943-45), organizing or co-organizing protests. On September 11, 2011, the OWP initiated a rally opposite the Presidential Palace in Warsaw and wrote a collective letter to the Law and Justice party (PiS) leader Jarosław Kaczyński. The letter, which remained unanswered, included questions on the Law and Justice policy regarding Poles living in former Poland's East Frontiers.