Se eu ficar na Tailândia por apenas um dia do 1 e pagar a multa do 500 Baht, ainda recebo algum carimbo "Overstay" no meu passaporte?

Big tip from foreign Thai resident... If you have any overstays in your passport (dangerous as you can be blacklisted) when you replace your passport book it all resets and you get a new number. Thai immigration smiled when he seen my new passport book and told me my overstays are all gone. I specifically asked in Thai if they had any electronic record of my previous overstays, because when paying the "fines" they keyed stuff into their computer. He told me new book is new record, they keep no record beyond the visual inspection of the passport.

My passport books get filled pretty quickly, but even if your book is not full and you are in a pinch you can just buy a new book if you were to lose yours.

Athough I overstayed for just 1 day, the immigration officers at Don Mu'ng were very nice and told me that I don't have to pay the 500 fine (probably because it's the only overstay I had in this passport); the officer added that if I would stay 2 days or more there would have been a fine.

There is a small deep Blue signature in Thai underneath the departation signature; though AOTM, with my little ability to read Thai, I don't know what it means (I prefer not to post a picture); I assume that's something similar or identical to what the American immigration consultant spoke about.

I didn't see the immigration officer inputting anything to a computer and he clued he only have to stamp because of procedure; I believe nothing was noted in a computer.

Also, afterwards, I could get the student visa in the general consulate, as planned, without problems.