In case of a child abduction to Poland the first step to be taken is to file an application for the return of the child, under the Convention on the Civil Aspects of International Child Abduction, under the Polish Family Code and Polish Civil Procedure Act.
Such an application is recognized by the competent authorities (courts or administrative bodies) of the country to which the child was abducted or detained. In Poland it will be the court where the child resides with the parent.
KG Legal, Polish law firm specialising in cross border family cases and acting for foreigners before the Polish courts prepared a presentation on child abduction to Poland. You can READ it or you can WATCH it.