I don't know if the below will help you.I posted on your other thread
I would suggest I know this will be a pain in the arse but take a trip to Poland find a lawyer here and get the ball rolling with them. Find me the closest city to where he lived and get an English speaking lawyer and be quick because no doubt the x wife is doing everything she can to disinherit your daughters.]]
According to the Polish Inheritance Law, the heir acquires the inheritance at the moment of the opening of the inheritance (article 942 kc), that is at the moment of the testator's death (article 924 kc). However, the death itself is not enough to make somebody an owner of the real estate belonging to the deceased. Firstly, it is necessary to obtain a decision regarding the acquisition of Polish inheritance. Such a decision is issued by the Polish Inheritance Court. During the proceedings, the court examines who is entitled to inherit (in particular if the testator left a will) and to what share of the inheritance the individual heirs are entitled to.
To begin the proceedings to obtain a decision regarding the acquisition of the inheritance, a special application needs to be submitted. To draft it, the copies of the civil status records of the heirs and testator's death certificate are necessary. The application needs to be submitted to the court at the last place of testator's residence, and, if such a place of residence in Poland cannot be established, to the court at the place where the inheritance estate or its part is located (Polish Inheritance Court). In case the above-mentioned grounds do not exist, the inheritance court is the district court of the city of Warsaw. The payment of 50 zł needs to be submitted with the application.
After the proceedings, the court issues a decision, which will state who inherits after the deceased. Only when the decision goes into effect, do the heirs become the formal owners (or joint owners) of the real estate. An appeal from the decision can be taken by filing an appeal.
It is worth noting that since March 1, 2009, Polish notaries became authorized to issue a confirmation of inheritance in Poland based on the inheritance protocol. The necessary conditions for utilizing this institution is the presence of all persons eligible for inheritance and the lack of conflict between them in regards to the division of inheritance. In practice, all potential heirs meet at the notary's office to draft the inheritance protocol. Based on this protocol, the notary drafts a confirmation act of drafting the inheritance protocol. Next, he registers it in the electronic registrar of the confirmations of inheritance. From this moment, the act goes into effect the same way the court decision regarding the inheritance acquisition deed does.