Same concept - if what the OP's Friend head was a case of a person actually getting a Visa canceled (and not a rumor) most likely that person (who ever it was) likely had an Extension of an O Visa - left Thailand without getting a Reentry Permit and the Extension was canceled upon reentry! By the way I have read several posts over the years on the Thai Visa. com immigration forum where people had this very thing happen to them.

Buy and use a Reentry Permit. You can go out of Thailand and come back. But it does not make the visa / extension last longer... If you stay out of Thailand past the expiry date - the visa / extension will expire (be finished).

If the Friend actually got a 'Visa' Canceled... Most likely that friend had an Extension of a O Visa and failed to get a reentry permit and just didn't understand what happened

Forget to get a reentry permit with a O One Year Extension - then it is canceled

Yes - I added to my question

What is the visa or extension type? O visa with extension or O-A M first year? Reentry permits are required for one year extensions if one leaves the country and comes back

What is the visa or extension type? O visa with extension or O-A M first year? Reentry permits are required for one year extensions if one leaves the country and comes back

I see now

They don't VoA either?

I could not find that explained in any comment or on her webpage

What about an Exempt Entry into Thailand 30 days - no visa needed.