The DTV has to be applied for fully online as a e-visa through the embassy/consulate that serves your area. Whether a contract up to august is sufficient I guess only your consulate can decide. Try to apply and explain your situation as a freelance/remote worker and that you will continue with this with a new contract and klients after the current one expires.
states, if you hold a Canadian or any other passport from this you can enter Thailand and stay for 60 days without any visa.
Generally you might also enter Thailand through Laos with a visa issued in Cambodia, but they might require proof of further travel into Thailand and all embassies/consulate do e-visa now.
If you’ve been registered and physically stayed in Jomtien, you’ll don’t need to be registered also in Rayong just because you’ve had a running rental contract there. It’s where you physically stay that matters.
Regarding converting I guess it’s quite equal. You’ll need a residence certificate and a health certificate and most probably a IDP together with your national licence to convert anyway.
The simple test regarding sight and reaction is more or less similar at the different DLT’s and they use the same equipment for this. You’ll need to watch this movie in the link and answer some simple questions and you can book appointment through this app.
There’s no information indicating that the new visa exemption scheme only was meant to be temporary and that’s all everyone knows at date. So still 60 days visa exemption and free stamp upon arrival if you hold a passport from one of the 93 nations entitled.
If you entered on an actual tourist visa which you applied for and got before you travelled to Thailand and were stamped in for 60 days, you will go to the Chaengwattna office Immigration office, Government Complex Building B.
You will go here.
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And you can book online
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If you enter on a 60-day stamp for free, it is NOT a tourist visa, it is a visa-exempt entry if you are eligible to apply for a 30-day tourism extension.
You are going to go to the IT Square Laksi Plaza temporary office, just next to Lak Si station of SRT Dark Red Line / MRT Pink Line.
Your best and potentially only option is to use a professional landborder transport company to bounce you. They’re fair priced anyway, know the name of the game and will not bring you unless they’re confident in getting you another visa exemption.
Some immigrations in fact accept proof of 12-15 months consecutive transfers of minimum 65K baht for the initial 90 days Non O visa in country as well.