I’m not sure if that’s necessary but I had it all on me so my strategy was just to drown the guy processing my visa in official paperwork 😅. Guess it worked.
I’m a freelance writer with a registered sole proprietorship in Singapore. Sent in all the official documents showing registration in my name, bank statements in my name and tax filings in my name. DTV in January, no problems and have been in and out of Phuket/Bangkok at least once a month since without any issues.