I have an account at Bangkok Bank (Hua Hin). It is in my name only. I have used it for extensions for the last 6 years.

I added my wife as a signatory 6 years ago. You can see her signature in the book if you hold it up to a certain type of light.

I had her go alone to do a wire of B300,000 just to be sure and there were no problems.

I have done this on 4 different currency accounts.