What are the best long-stay visa options for my wife and child coming from South Korea to Thailand?

@Stephen ***********

as soon as she gets here on the 90 day Non-O based on being married to someone on a 'retirement visa' you BOTH need to go to the immigration office in your area to get the list of required documents that show what you need so she can get an extension 'piggy backing' on yours (called Trailing Spouse Extension)

@Stephen ***********

honestly I'd wait until your wife is here and you have her passport, and all the documents to take there together so they can look at them and tell you if any of them need 'certifying' at the korean consulate

BUT that's just what I'd do, because then they KNOW what it is you're trying to do, where as you going without her trying to communicate in mime, charades and pidginengrish might not get the whole point across :)

@Stephen ***********

I don't want to make a mess, but just a thought.

While your children would be fine to just enter/exit Thailand when they are overstaying (only just get an overstay stamp on their passport), if you are seeing them enroll in school in Thailand, you may want them to be here legally.

If this is the case, have your wife check with the Thai embassy in Korea if they can get Non-O dependant on you like yours.

Or, if they have dual passports, make sure to let them enter on visa-exempt (not on visa waiver/bilateral agreement with Korean passport even it gives you 90days), because visa-exempt entry stamp can be converted to Non-ED for example, but entry on visa-waiver cannot.

@Stephen ***********

, (modified) visa-exempt scheme and visa-waiver on bilateral agreement are different program and defined separately.

Both has possibility to apply for in-country visa. Sorry for my mistake before, confusing you.

But If someone enter Thailand on bilateral agreement (visa-waver), may not be able to apply for extension.

Some international schools wouldn't let students enroll if they are overstaying.

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@Stephen ***********

seems to be so.

yes, Better to check

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