“…In particular, Tourism Union International (TUI) a German-based travel company using blockchain technology and related cryptocurrencies has implemented a process for their clients to book and pay for their reservations or for obtaining other services (Rashideh, 2020). Moreover, TUI intends to solve other problems such as lack of transparency about the hotel's capacities, different rates at different source markets, manual communications and loss of information, introducing smart contract associate with BC technology (Irannezhad and Mahadevan, 2020). Some others private companies upcoming examples who are introducing this technology are Travelflex, Tripago, Roomdao (Yadav, et al, 2021), CryptoBnB application by AirBnB, UBER (Irannezhad and Mahadevan, 2020), Singapore airline (KrisPay project), Aeron (Karagoz Zeren and Demirel, 2020).…”