at the Immigration Center Chiang Mai yesterday: we arrived at 11.30 and got the visa 90 minutes later. We had application form, copies of passport of front page and page with 30 days stamp and TM6 and the original of TM6, pass foto and 1'900 THB. We did not have TM30 and no onward ticket and were not asked for it, neither we had to show cash - everybody was friendly and in a good mood 🙂