@Andy *****

... you can't get the non imm O spouse, in Thailand, only extension of stay based on it.

Which non O do you want, single entry 90 days or 1 year multiple entry?

Doubtful you will get a flight to Seoul and if you do ... even more doubtful you'll get back! 😷😷😷 🤷‍♂️

You can still use it until the Valid Until date, then go to plan B after it expires. Remember, if you leave Thailand and return just before the Valid Until date, you will get another 90 days.

The whole process can be done online but I guess this may depend which Imm. office you are using.

Much easier if you fly somewhere.

I use 2 uk PP's one for Thai non O (Thai spouse) and one for Vietnam (TRC). In and out of Thailand on 1 PP and in and out of VN on other PP. I also get my non O visa from the hcmc consulate on the PP that doesn't have the VN entry stamps and TRC.

It could be an option for you if you can't get it done at land borders.

@Stuart ********

... only restriction is the 50 year minimum age ... for which of course the OP qualifies.

@Chris *********

.. you also need the TM6 landing card number which you obviously don't get ... until you land, and is entered into the system by the IO.

@Maurice ******

... yeah, the washing machine! 😂😂

In short ... YES, every page.