What are the requirements for a 30-day extension on a 60-day visa-free entry stamp in Thailand?

To apply for a 30-day extension on a 60-day free entry stamp in Thailand, you must visit your local Thai Immigration office before your current visa expires. Essential documents include a completed TM30 address registration from your accommodation, your passport, a non-refundable fee of approximately 1900 baht, and usually one passport-sized photo. Note that some Immigration offices may have specific submission timelines, such as accepting applications only in the week prior to the expiration date. Additional forms may be required depending on the specific location.