What documents do I need to open a bank account in Udon Thani as a foreigner on my wife's Blue Book TR14?

To open a bank account in Udon Thani on your wife's blue book TR14, you generally need at least your passport, visa, and possibly your wife's blue book. Some banks may require additional documentation, such as a residency certificate or a second form of ID. While some expats suggest bringing a marriage certificate and having it translated, experiences vary greatly depending on the bank and branch. Trying different banks, especially your wife's, is advisable, as requirements can be quite flexible.