Update from Samui immigration visit April 13.
I have a non-b visa, expired on April 1.
Received an "under consideration" 30-day emergency extension stamp dated April 16.
On April 13 (today), I was told to return on April 16 or 17.
What I learned:
1. Samui will not grant second stamp early
2. In Samui, visa holders (NOT TOURIST TYPES) must return for the follow up stamp.
3. Samui will not stamp you as an over stay NOR will they charge you overstay fee if + 1 day from stamp date.
4. There are no fees for second stamp
5. there is no documentation required for second stamp (aside from your passport, obviously)
Keep in mind, I did not get my second stamp yet and things could change by the end of the week. 😄
Also, please don't ask me for advise on your specific situation as I am not an expert, just reporting in what I learned today.