@Ivan ***********
When they first introduced it they allowed people to complete it on arrival but I think later on they required it to be completed prior to travel. When I traveled last May they just recommended to print it out to speed up processing but as long as it had been submitted and you were in the system all good. Showing the QR code on your phone was another option. I think the Thailand DAC will be an improvement over the old paper TM6 because I have had problems with losing it in the past. Anyway time will tell.