I have a 60-day tourist visa and will be applying for the 30-day extension at Jomtien immigration. Do you get the extension right there on the spot or do you have to come back the next day to collect your passport with the extension in it?
TLDR : Answer Summary
The Jomtien immigration office typically requires applicants to apply for a visa extension when there is less than a week remaining on their current visa. Most often, the office will hold your passport and you will need to return the next day to collect it with the extension.