If your more than a few days over PREY you get to the airport it's not too bad max fine 20k bht if you stopped before I've heard your looking at being blacklisted for up to 10years
So IF you have a negative result and you book another night you still cannot leave!, Soon as I got negative result in Phuket I was free to leave and return
exactly what I done immigration at sisaket very helpful,by all means use an agent if you need BUT RUN A MILE FROM ANY THAT TELL YOU YOU DONT NEED 800K IN THE BANK THEY CAN STILL GET IT
Y E S YOU DO IT IS A CLEAR REQUIREMENT OF YOUR EXTENSION OF STAY
The visa WILL be legal but how you get it without money in the bank is not so the visa will not be vslid
I entered Thailand on non o visa money needed to be in bank for 2 months prior and I believe 1month after you apply for extension of stay BUT PLEASE CHECK WITH IMMIGRATION OFFICE LOCAL TO YOU
agree but I called it a visa as most people don't seem to understand when you call it an extension of stay unless they already done it,tbh I didn't either till I done it myself