Digitalization changes all kind of sectors of the economy – in particular, financial industry, which is probably one of the first to undergo fundamental changes. As money and financial transactions are immaterial, it is evident that financial industry has been one of the first economic sectors to be digitalized. [---] From the international private law perspective, it is of particular interest how traditional paradigms, such as location of a transaction (loci actus), can change. While contracts concluded by using fintechs will not raise specific choice-of-law problems as the principles of law applicable to contracts would not change, the situation is different for proprietary effects of transactions in securities. Even though securities were immaterialized long before the existence of fintechs or blockchain, the use of decentralized networks based on distributed ledger technology (DLT) raises new problems as to the assessment of the location of the transaction. [---]