Abstract
Who would want to flee the war? Start over in another country? Overcoming the language barrier, thinking about how to find a job, apartment and kindergarten for your child? Where to find friends or people who will understand and help? Nobody wants to feel it. Ukrainians who have found temporary protection from the war in the Czech Republic are forced to face Czech legal norms every day. Ukrainian law and the law of the Czech Republic are two different but interrelated legal systems. Massive influx of Ukrainian citizens into the territory of the Czech Republic after Russia's aggression against Ukraine in February 2022 caused a radical strengthening of interaction between elements of both
Ukrainian and Czech law. The strengthening of interaction took place primarily in the field of practical application of law. The full scale of this phenomenon is easily demonstrated by the fact that the Czech Republic has received the largest number of Ukrainian refugees per capita in the European Union - 470,000 refugees, which is 4 percent of the population. In this regard, it is easy to understand that the appearance of thousands of Ukrainian certificates, licenses and other acts represented primarily the problem of practical application of legislation.
However, the connection between the two legal systems has also attracted the attention of the legal community and is important to the debate both from both practical and theoretical point of view.