Corrected:
Hello, everyone!
Is it true that I can get a visa extension after the first 30 days in Thailand from a LOCAL IMMIGRATION OFFICE for an additional 60 days, and I don't have to leave Thailand to get it from another country? If so, why is it that we are required to have a confirmed/bought onward tickets leaving Thailand on or before the 30 day limit when we get to immigration at the airport?
If this is the case, what's the stipulation or requirements in order to do it at the Bangkok Thai Embassy? Thank you in advance for you help.
TLDR : Answer Summary
Yes, you can extend your 30-day visa exemption for an additional 30 days at a local immigration office in Thailand for 1,900 THB, and no proof of onward travel is required for this extension. However, there is no Thai embassy located in Thailand; for a 60-day single-entry tourist visa, you would need to visit a Thai consulate in a neighboring country.