According to the Thailand Trade and Economic Office's website, below are the countries that can get a Visa on Arrival (VOA) for 15 days, 30 days, and even 90 days (!). Not a bad deal if you're from Argentina. Visa exempt means Visa on Arrival. So you just need to get on the airplane and land. This came from their official government website so we're taking it as the gospel, even during these weird covid 19 times. Check the screen shot below if you don't want to click on the link.