What paperwork is needed for a 30-day visa extension in Thailand, and can I do it in Pai?

To apply for a 30-day visa extension in Thailand, you need the following paperwork: a copy of the data page of your passport, your entry stamp, your TM6 departure card, a completed TM7 application form (available at the immigration office), and a passport-sized photo. The fee for the extension is 1,900 baht. If you are in Pai, ensure you use an address within the service zone of the local immigration office.