What documents do I need to bring when re-entering Thailand after a trip to Hong Kong with a DTV visa?

There are clear and obvious things you def need (visa, passport, TDAC) but the real problem is that individual IOs can ask for virtually anything, whereas most won’t ask for anything else. It sounds like DTV is particularly vulnerable to this with people on ‘Soft Powers’ option being asked to prove stuff like attendance on the course/training, accommodation, even some being asked for return travel booking (which is a bit crazy on a DTV). DTV’ers on Workation option have been asked for proof of earnings, proof of bank deposits etc. 90-95% of the time chances are you will not be asked for any of these things, but it can and does happen.

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Bringing documents that prove that you are still eligible for your visa may not be a bad idea. Mostly, you will not be asked for those. There were a few cases, some DTV holders were asked for proof and stamped in on visa-exempt when they couldn't show them.

If you have a DTV it's a 5 year multiple entry visa. <- That means the re-entry permit is built into it and you can enter thailand as many times as you want to with each entry getting you a 180 day entry stamp.

PRINT out the PDF file that they sent you in the approval email <- that is your visa. Hand it and your passport to the officer when you stamp in and CHECK your entry stamp before you walk away from the counter to make sure you got stamped in for 180 days :)

Also don't forget to fill out a TDAC (Thailand Digital Arrival Card) before you come back to the country (you can do it from 3 days before your arrival right on down until you're standing in the arrival hall waiting to stamp in, <- there are free kiosks at the airport.