Thanks for the suggestions. I have presented the original death certificate and will to no avail. There is no dispute by bank that funds are held. Just a matter of procedure.
I've been to the attorney general department and they have told me what needs to be done legally. This involves numerous documents that need to be notarized.. certified ..translated from deceased home country. Then I apply to court. It takes 4 months then to get the required order.
But...I was advised by them that there may be a short cut to this approach.
This has prompted the search for a lawyer that someone may have used for a similar situation.
The bank account is in Bangkok
Cheers.