Can a holder of a non-immigrant O A 1-year visa open a bank account in Thailand?

Yes, holders of a non-immigrant O A 1-year visa can open a bank account in Thailand. While it is possible for anyone to open an account, some banks may impose additional requirements. Users have reported successfully opening accounts at various banks, including Bangkok Bank and Kasikorn Bank, often only requiring a passport and proof of residence, such as a rental contract. Some users found it helpful to bring a Thai person along to assist with the process. There is some debate regarding the necessity of a letter from an embassy, with most users concluding that it's not required. Preparing necessary documents and being aware of the specific bank's policies can facilitate the process.