I used tax credit certificate from Revenue Commissioners (HMRC in d UK). You could use bank statement or Council Tax letter as proof of address I reckon.
I initially sent copy of contract, which I got AI to do 555. They then came back looking for an employment letter signed by a Director or HR person, addressed to the Embassy, saying what my job was, length of service, and That I was required to work remotely. That letter + up to date bank statement was additional info they came back looking for. Once I uploaded those I got the DTV the next day.
I got a DTV from London Embassy. I am an employee of a company in Ireland and get paid monthly by them. I showed the 500k proof in one bank account that doesn't show my monthly wages. So I reckon you'll be fine. Have an up-to-date bank statement, not one a few months old. Employment letter needs to say Required to Work Remotely and be addressed to Thai Embassy.
Time expired from when you started to when you submitted documents? I think the window isnt very long, maybe 2 weeks from when you start the application to when you're supposed to have all your documents submitted. Start a new application tomorrow.
yes. Your the Managing Director of your own business. Just make sure you include has to perform his duties remotely. Get AI to do up an invoice for you. Thai officials love paper.
Up to date bank statement needed. The statement you uploaded might be 1 or 2 months old. I'm guessing you invoice clients and they transfer money into your account. I'd send a couple of invoices and show corresponding amount in bank account. Do up your own employment letter, saying you are required to work remotely, sign it as company Director.
Honestly you should be able to give it a go yourself. Get current bank statement showing proof of required funds, imsge of your passport, selfie on your phone of head and shoulders, contract (which you can get AI to do, include "required to work remotely", put in the HR or Directors name, sign it yourself in their name, have the contract addressed to Thai Embassy, have relevant flight number that you'd like to use to fly into Thailand eg QR19. Get utility bill or something from govt, like a tax return with your name and address on it. Really really easy. I did it last weekend via Embassy in London. Sorry can't help with agent.