@Ellie ******
. Thank you for the reply. I am comfortable meeting all the requirements for the retirement visa. Unfortunately the application will be at a different office to the cancellation so I can't take the 1st option.
My company is insisting that I do not have to cancel the extension and are refusing to provide any paperwork. My work permit has already been sent for cancellation. What can I do? Can I cancel the extension myself without any paperwork? Can I just leave Thailand and return on a tourist visa?