Did mine online, rejected, no reason given. Went to Tak Immigration at Mae Sot. Approved in 5 minutes, no TM30 checked. Told not to do online but either visit immigration office or use mail.
What I was trying to determine is if I leave the country within the term of my Visa, is there a way to get the full 12 months. I have been told that if I leave say in September, on my return I can get a further 12 months, Sept 2020. I just wanted to get the full 12 months on my original visa.