yes I have found out today I go to immigration to move the retirement visa from my old passport to my new passport
I had all the paperwork to complete the process
But then they asked me for my bank book I was not expecting this so I had a row with the officer, about it and she got her boss involved and I had to go down to the bank to get the statement for 6 months
I was lucky that the bank helped me as I didn't have my bank book with me
you just go to the registration office and get married take a couple of people as witnesses and you will have a thai marriage certificate as proof for the immigration.
You are not asking for certificate for a UK marriage certificate or anything else