>I understand if I cancel I have 7 days to acquire the new extension, or transfer it, if that is even possible.
Sadly, not true. If you cancel an extension of stay, you have until 11:59PM THE SAME DAY to leave Thailand (or potentially get another extension of stay), otherwise you'll be on overstay.
I'm curious, is this the same type of school? For example, are you going from one informal training school to another, OR are you going from an informal training school to a university?
@Ellie ******
, is it possible to cancel an extension of stay based on studying in advance to give the schools more time to process paperwork?