What Documents Are Needed to Change from a Non-B Visa to a Tourist Visa in Vientiane?

Tobin Whiting okay then you do NOT have any extension from the immigration office you hold a year-long, multi-entry Non-B visa from a thai consulate that you bounce out and in every 90 days to get another 90 days.

You can just stamp out on your last entry (or really any entry) and go buy a new visa. There's no canceling it, there's no worry at the border etc.

I asked that because IF you're on the 90 day entry you get from a Non-B (meaning you have NOT extended it at all at the immigration office) you can just leave the country and stamp out.

BUT

IF you are on an extension of stay based on employment until you actually go to the labor office and cancel your work permit, then take that receipt to the immigration office and cancel the extension I don't even think you can stamp out at a land crossing.

You need to cancel the extension BEFORE you exit the country, because just stamping out of the country doesn't cancel your extension officially

The real question IS

Are you currently on the 90 day original entry of the Non-B visa

OR

Are you on an extension from the immigration office?