Coming to Thailand on 30 day visa exempt and I want to extend, my question is (and it's probably been asked a thousand times before) do I apply for extension at the airport when I arrive or do I have to go to an immigration office within that 29 day period. TIA
TLDR : Answer Summary
To extend a 30-day visa exemption in Thailand, you must apply at a local immigration office, not at the airport. It's recommended to visit the immigration office at least a week before your visa exemption expires. Make sure to bring a passport photo, copies of your passport including the visa on arrival stamp, and the fee of 1,900 baht. Each immigration office may have slight variations in their requirements, so check specific details with the office where you plan to apply. Additionally, ensure that your accommodation has registered a TM30 address with Thai Immigration, which is commonly required.