Do a BORDER BOUNCE to get the DTV 180 day extension. It's simple and easy to do from Chiang Mai.
Use an experienced border run service company to take you out and back in the same day.
In a recent post
@Tod ********
had replied...
Just so you're clear..
You're not doing a visa run 😮 What you really are doing is called a "border bounce"
VISA RUN <- where you RUN to a thai consulate in another country and BUY a visa for thailand then come back
BORDER BOUNCE <- where you go to the border, stamp out of thailand, "BOUNCE" in and out of another country then stamp back into thailand to get a new entry stamp
Also just so you know, no matter how you get there, IF you go on your own to either the Chiang Khong/Huay Xai or the Chiang Saen/Special Economic Zone borders with Lao in Chiang Rai province you have to stay IN Lao 2 days. You have to show proof you're leaving thailand in 60 days when you stamp back in and they ask for proof of where you're staying
I'd say USE A SERVICE like Chiang Mai Visa Run to get you to the border, get you out and back the same day and bring you back to Chiang Mai..
You don't show proof you're leaving in 60 days, you don't show lodging and you don't have to stay out 2 nights, they get you out and right back in
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Those do it yourself, bounce yourself ideas don't save you any money and often cause more grief than just paying a good service to take you there and back"