Switching visa type
Would appreciate some feedback on this.
I am about to get married to my long-patient girlfriend. She is currently on a DTV (Thai Soft Powers), and once we are married will change her visa to a dependent visa (retirement). When doing some research online, I read that we can do this without leaving the country, and just need to book an appointment at our local IO, take along the marriage documentation, and show an increased payment per month into my account since the marriage (I use the 65k a month method, and apparently I have to increase this by 32,550 a month for my dependent wife). No issue with any of this. So, I went to my local IO today to outline my intetions and ask (i) what docs will they require, and (ii) how to make an appointment. BUT, the IO told me that I could not switch within country and she will have to leave Thailand and apply for a Non O at an embassy/consulate then re-enter Thailand on her new Non O, and then book the appointment at the IO. This totally contradicts what I had read so I was totally confused.
Can any of you guys please give me your advice, particularly based on actual experience rather than what you have heard.
I am also not interested in replies along the lines of 'Your IO have already told you that you can't do it, so what are you asking here'. Well the reason I am asking is - I read this in several places (that we could switch without leaving Thailand) and it would not be the first time an individual IO is misinformed and tells you the wrong thing. I have had that happen to me before and I went back a 2nd time (on a completely different issue), and hey presto I got what I wanted.