What paperwork is required for a 30-day tourist visa extension in Thailand?

For a 30-day tourist visa extension in Thailand, you will generally need a set of paperwork, which might include your passport, a completed application form, a recent passport-sized photo, and potentially a print-out of your eVisa if applicable. While the list can vary slightly by location, it is typically consistent across immigration offices, including those in Phuket. It's also helpful to identify local services in Patong for copying documents and obtaining passport photos.