After the judgment of 11 March 2016 no. I CSK 64/15 given by the Polish Supreme Court it seems to be impossible to define in Polish legal space the proper law applicable to the succession case. In a very short succession judgment (in which the deceased Polish citizen died in Sweden in 2008) Supreme Court has done at least three fundamental mistakes concerning the intertemporal application of legal rules. The Supreme Court has not recognized that Regulation (EU) No 650/2012 (of the European Parliament and of the Council of 4 July 2012 on jurisdiction, applicable law, recognition and enforcement of decisions and acceptance and enforcement of authentic instruments in matters of succession and on the creation of a European Certificate of Succession) is applied only to the succession of persons who die on or after 17 August 2015. It mistook also the rules of 1965 Polish statute on private international law with a new one (2011). Conclusions drawn from this particular case by court are too broad and can be applied also to cases much more different that case on which the judgment was based. Court decision analyzed in this article is an example of the comic solution of the problems arising in the Polish succession law. This is why the criticism on this order seems to be important because of its possible influence on future Polish court's practice.