The paper explores how laws in the EU and Ukraine can be aligned with court decisions in matters of inheritance and marital property. By comparing different methods, it was found that using the same criteria for determining jurisdiction and applicable law can lead to applying the court's own law in some cases. In Ukraine, agreements between spouses can help synchronize laws with court decisions in marital property matters. However, the current Ukrainian law does not always align applicable law with court jurisdiction in inheritance cases involving property abroad. To improve this, the law should be updated so that a deceased person's choice of law in their will applies to all types of property, regardless of location.