When cancelling an ED extension, how long before the extension or school letter end date can you cancel?
I’ve got the school letter saying the official course end date is 5 days after the extension ends but was planning on leaving two weeks before the extension ends.
TLDR : Answer Summary
You can typically cancel an ED extension up to 2 weeks before the end date stated in your school letter. It is important to cancel at the Thai Immigration office where the ED visa was issued. Additionally, schools generally do not provide paperwork that indicates a course continuation beyond the current visa extension.