that some immigration offices forcing it doesn't mean it's legal. It's a base of anglo Saxon law, that you can't change permission backwards. It applies in many cases in Thailand like alcohol selling law. Once permitted you can extend but a new owner of the place won't get it. Same like driver licenses and non o extensions. Every changes apply only for new visas.
you can't increase the requirement on an existing extension. It's not possible to change law backwards. So please don't spread information what is clearly untrue!
No Czech German, and never a problem. If half Thai you don't need any vida. Kids not have any problems until 15years old.and with a baby i would even think about getting a visa. He got student card from school, of course school has copy of passport when registered but after this no interest in anything. And i don't met a parent who was solving this, bc no problem at all. And he went in and out thailand 5 times in this period on Xmas and summer break
I wouldn't think to much about a kid younger than 14. There is no problem staying in Thailand and going to school. My Son started school with 12 and 3 month before he turned 15 we applied with a complete new passport for education visa in his home country (EU) and let the passport send my mail. Then he made a weekend trip to kula Lumpur switched passports and activated the visa. He left Thailand between 12 and 15 every year 2 times and never a problem with overstay. They stamp you out, put red stamp in, that's it. When return no problem too.
how you have to pay overstay when you left the country? This would meet you have to do it also on a retirement extension and if you come back in time you would have the right to extend again. But this you have not. Is there any case that a retirement non-O was denied because not cancelled the extension?
what i don't understand why you have to cancel the extension? If you leave the country any extension is cancelled automatically when you not do reentry permit