What do I need for a 30-day extension at Jomtien Immigration?

To get a 30-day extension at Jomtien Immigration, you need to apply during the last week of your current visa validity. Essential documents include your passport, a passport photo, the TM30 form, and a TM7 form filled out. It might be helpful to bring proof of residence, such as a condo contract or a residence certificate. Some users recommend hiring an agent to handle the process efficiently and avoid long queues, while others suggest simply asking for a handout at the information desk at immigration for a complete list of requirements.