But I think that the workplace assuming you'd do it is also less likely because isn't there a few days window? Wouldn't everyone just want to give themselves that time?
yes but 99% of the time the employer does it. They can even do it without the original WP - and the minute it's done our stay is up. Generally schools don't leave it in your hands...
And when I've switched schools, the same thing: I've never gone to do it all of my past schools do it directly themselves.
*They also have to then provide you with the slip that the WP was cancelled which can be difficult if you ended on bad terms. The amount of power schools have is really crazy.
(Ps. I know the WP is "ours" but it's specific to 1 employer and never usable again so.... Technically it belongs to that place of employment... If you know what I mean)
cancelling a work permit does not require the passport and does not require the employee to do anything - the employer cancels the work permit (and usually requests the original WP back, which is fair because the WP technically belongs to the specific employer) **if for some reason your employer doesn't cancel your WP you can go do it yourself
But in my experience every employer has done this themselves
Cancelling the visa extension (or notifying immigration of the extension ending) is different and DOES require you *with your passport* as well as a letter or document from the school stating the end date. It should be done the same day as your work permit is cancelled. From there, the immigration stamps that your extension has ended and you must leave by the end of that day *or* you can receive an "extension request denied stamp" for 1900 baht and get 7 more days with that.
** Note that going to immigration and informing them of the end of your extension only applies if you're not working at a new place right away
If leaving Thailand or being unemployed for a while before working again, it's followed as I said.
I've done it multiple times in multiple provinces and know exactly how it works.
I found something online that says "up to 15 days" but that's more or less on the long end of things. Applying right away should have no problem getting it back within 10 days.
Up to you really but just not applying for it sounds like it'd be quite a risk
Enter with a tourist visa (apply online and should be approved while you're still on your trip to Taiwan) this will almost for sure ensure less questions. Basically the free entry (no visa) is a gift for people to come and see Thailand - not an endless way to stay without a visa. Tourist visa for the next couple of entries will mean probably no questions (they're just glad you're paying for the right to come in)
As others have said, a long term visa is best because even so many tourist stamps will go so long as you won't be a tourist at all after a year+ of staying almost solely in Thailand. Then, technically yes you would be violating the law.