Chiang Mai extension Update:
Had my TM 7 filled in, photocopy if passport, departure card, stamp and SETV visa. One photo, passports.
No departure flight needed. ☺️☺️
We arrived at 8:30 and was out by 8:50.
If you get a taxi there, I would advise to get a taxi to the airport plaza and then walking 5 min to the immigration building. Cheaper.
No TM30 needed but our Airbnb host did it online so not sure if that affected anything. They didn’t ask for it.
Really easy, thanks for the help.