What do you need to bring to immigration for a 30-day extension of your visa in Thailand?

To apply for a 30-day extension in Thailand after the initial 60-day stay, you typically need several documents. Common requirements include your passport and photocopies of the main page and the stamp page, proof of address, and a fee of 1900 baht. Additionally, a passport-sized photo may also be required. Note that specific requirements can vary by immigration office.