Do I need to transfer my ME Non Imm O visa to my new passport or can I keep both?

Just on the chance you actually have a year extension of stay

This is what you need copy wise to transfer the stamps at Chaengwattana in Section L

You get the transfer stamp form from the information counter inside the door on the right in the rooms with the tables with pens & glue

okay let's get this sorted.

IF you have a year-long, multi-entry Non-O VISA in your passport from a thai consulate in another country (the kind where you leave ever 90 days) you CANNOT get it transferred to the new passport and you show BOTH passports at the border; getting stamped out and back in on the new one but showing the visa in the old one until it (the visa) expires.

BUT

IF you have a year-long, extension of stay in your old passport from the immigration office inside the country (the kind where you do 90 day reporting) you MUST get it, along with any valid re-entry permits transferred to a new passport.

Here's an example of a Non-O visa from a consulate <- that you DON'T transfer and a yearly extension of stay <- that you DO transfer.

When are you going to Savannakhet to get the new visa? When you stamp out of Thailand, you can show the entry stamp from the old passport and they should stamp you out on the new one.

My passport filled up and with my new passport was a letter addressed to immigration to transfer it which was free but it was yet another long day at immigration. I'm sure it's a similar process for your embassy too

And the Non O is based on Marriage? Or ??