I will be requesting a 30 day extension as a U.S. citizen at the immigration office soon. I am currently in Thailand with an arrival visa. Is there anything I need to bring with me, Aside from my passport, and 1900 baht?
TLDR : Answer Summary
To obtain a 30-day visa extension in Thailand as a U.S. citizen, you need to bring your passport, 1900 baht, and potentially additional documents depending on the immigration office. It is recommended to have proof of accommodation (like a TM30 form from your hotel or landlord), as well as a photocopy of your passport. Immigration offices may have varying requirements, so it's good to check in advance and consider visiting a less crowded office.