Can I extend my stay in Thailand with an Argentina passport under the visa waiver program?

Lately i did meet a guy from Argentina who only got a 30 days visa exempt stamp. He did not know about the 90 days bi-lateral agreement and did not check/ask about it at the entry immigration. Always good to immediately check your stamp. Immigration officers can make mistakes.

People from FIVE countries; Argentina, Brazil, Chile, Peru and South Korea, get 90 day free entry under the visa waiver program (it's a bi-lateral agreement that lets thaiz in to those countries for 90 days)

You CANNOT get any extension on that stamp other than the "application for extension NOT approved" stamp for 1900baht which gives you 7 days to get out of thailand AND which starts on the date you apply for it (it is not added to your current stamp expiration date.

You can fly out/back OR do a "border bounce" <- go to the border, stamp out of thailand, stamp in-n-out of another country and then stamp right back into thailand to get a NEW free 90 day entry stamp without much problem

IF you are going to border bounce by land use a service that takes you to the border gets you out and back.

DO NOT think you're going to save any baht by bouncing yourself or if you pick the wrong border or catch a crossing guard in the wrong mood you will cause more problems than you can imagine.