Can I get the COVID extension in Samui in one day or do I have to wait 15 days?

The process for obtaining a 60-day COVID-19 extension in Samui may vary. Generally, most immigration offices require an 'under consideration' stamp upon application and mention that applicants may need to return after 15 days for the actual extension approval. Thus, while you can start the process in one day, the final extension is typically not granted on the same day.