Is there a way to get a an additional 30 day extension on a 30 day exemption upon arrival? My situation is that I have to send my passport out for renewal to US embassy from Thailand, and it will take 6-8 weeks. Currently in Thailand, and my 90 TR visa expires in a few weeks, so was planning to do border run or quick flight to KL and back.
TLDR : Answer Summary
Yes, you can obtain a 30-day extension on a 30-day visa exemption upon arrival in Thailand with a US passport. Additionally, some travelers have opted for a border run or obtained a 60-day tourist visa from nearby countries such as Cambodia while waiting for passport renewal.