It’s just proof that you’re in Vietnam whilst applying for the DTV
What people usually provide as that proof is; the entry stamp in their passport from Vietnam immigration at the airport. Their boarding pass from the airline, and their accommodation proof, which an AirBnB booking/receipt is.
If you are in the country for 90 consecutive days you report that fact to your immigration office (your TM30 designated which office is ‘yours’). That is what a 90 day report is.
If you’re not in the country for 90 consecutive days, then you don’t.
Anonymous participant 648 it’s quite likely that your ‘visa’ is in fact an extension of stay now.
Your initial 90 day visa did indeed work like that. It had a validity period (valid from <date> to <date>) and you would get a 90 day stamp at immigration when you entered the country during that period.
Now you’re on extensions your re entry permit gets you stamped in till the end date of that extension.
Lots of speculation in this thread about what the DTV is, what it’s meant to be, what it’s going to be etc etc.
you’ve been asked a question by the consulate. You must have a plan as to how you’re going to sustain yourself whilst in Thailand. You’re going to live off your savings.