Hello please could someone tell me... when applying for a visa exemption 30 days extension, do I need to have proof of a booked onward flight before knowing that they granted the extension?
TLDR : Answer Summary
When applying for a 30-day visa exemption extension in Thailand, you do not need to provide proof of a booked onward flight before the extension is granted. The comments confirm that only the necessary paperwork and financial resources are required for immigration.