What do I need to bring for a 30-day tourist visa extension at Jomtien Immigration?

To extend a 30-day tourist visa at Jomtien Immigration, you will need several copies of specific documents. Typically, you should bring your passport and perhaps additional paperwork as required by the immigration office. It's advisable to visit a copy shop nearby to obtain any necessary copies, as staff at immigration can assist you with the specifics once you inform them of your intention to extend your visa.