I'm travelling from the the UK early next year and intend to stay for 86 days, using my 60 day visa exemption and then extending for a further 30 days. I know I'll need an onward ticket within the 60 days in case the airline asks for it but what documents will I need to take to the immigration office when I extend?
TLDR : Answer Summary
When extending a visa exemption in Thailand after an initial stay of 60 days, you typically need to prepare specific documents for the immigration office. Although requirements can vary by office, it's often suggested to have your passport, a completed extension application form, a passport-sized photo, and your onward travel ticket. Travelers recommend purchasing a low-cost return ticket or an onward travel ticket just for peace of mind, as airlines may ask for proof of onward travel. It's also advisable to check directly with the airline regarding their specific policies regarding ticket requirements for entry.