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 while on your wife's blue book TR14, you'll generally need your passport and the blue book. The exact requirements can vary by bank and branch; some might ask for additional documents like a residency certificate or a lease agreement. It's suggested to approach your wife's bank first and be prepared with the necessary documents, including possibly getting your UK marriage certificate translated. Experiences shared in the comments indicate that the process can be somewhat inconsistent, so trying different banks may yield different results.