Usually, this group doesn't allow the post "for a friend".

As you say, basically people would be treated as foreigners if enter on foreign passports. But there is a valid reason for an extension.

In her case, as she has an expired passport or Thai ID, definitely she can apply for a 1-year extension based on the "In the case of a person who used to have Thai nationality or whose parent is or was of Thai nationality visiting relatives or returning to his or her original homeland:" for any type of entry, not only for visa-exempt or tourist visas.

It's not "automatically" as proof of Thai nationality is required. But it's not difficult, it's quite normal not rare.

Q. Can our son be stamped to such 15 days on arrival and then do overstay?

-> It is possible. he will be stamped for overstaying when he leaves Thailand again, but no overstay fine or penalty until he turns 15 yo.

Q. And in this case would he need to show a departure flight? Will he be stamped overstay?

-> To enter Thailand by applying for VOA at the entry point, yes, he needs to meet all requirements for VOA.

These are some facts.

- Children under 15 yo are not fined but will be stamped for overstaying when they are into overstaying

- Even minors need to meet the all requirements to enter on Visa On Arrival for a 2000 baht fee

- Any foreigner cannot apply for an in-country visa (or so-called converting to Non-O) after entering on VOA. 15 days of VOA entry are not enough remaining days to proceed in-country visa process

- No foreigners including minor children on overstaying can apply for an in-country Non-O visa

OP explains what he's already doing, but his question is simply the last sentence. Or at least seems so to me. Sorry if i read wrong.

please read the question in the original post carefully, members. This post is NOT about how to make transition from banked money method to monthly transfer method for retirement extensions.

For monthly transfer method, 65k baht can be used anytime once in your account as international transfer. There is no requirement for keep specific balance in your Thai bank account for monthly income method

If you mean an under-consideration period for a 1-year extension, yes, you can by getting a re-entry permit. But you will want to talk about your travel itinerary with your local immigration office when or before you apply for an extension. Or before you get a re-entry permit at the latest.

If you mean an under-review period for an in-country initial visa application, you cannot travel abroad.

Yes, You have to transfer your valid extension-related stamps (not actual visa) to you new passport. Bring both passport to the immigration office that issued your extension. You need to do next 90-day report in person at the local immigraiton office as you got a new passport. Transfer stamps before or with your next 90 days report.

BUT, if you have a multiple entry Non-O visa, you cannot transfer visa itself. In that case, you have to bring both passport leave and enter Thailand until your visa expires.

Usually, ChaengWattana has you apply for a 30-day tourism extension first, which is the same reason as your entry stamp, as a 60-day visit Thai family extension is a different reason from your entry.

As you are already on a 60-day family visit extension, they may or may not give you a 30-day TOURISM extension now.

All you can do is go to CW at the end of your current stamp and ask for a 30-day tourism extension and there is no downside. Just ask whether you can apply for a 30-day tourism extension now or not, as you haven't applied for it yet.

The worst thing is they say no, you are already on an extension for not-tourism. Then, you have to do a border bounce or visa run if you want to stay longer.

@Jan *****************

, better to check the local office first because some use their own version of the form with additional stamped fields.

as long as you meet the requirement for 1-year extension based on being married to a Thai, you can apply for it no problem. you are applying for an extension for the same reason as your current visa, no need to get another visa. go to your local immigration office to get THEIR latest handout of requirements in advance.