What is the proper process to obtain a 60-day visa extension in Bangkok after initially arriving through the Phuket Sandbox?

You're out nothing by emailing your embassy here, asking if they issue the letter, and if they don't take a print out of that email with you to the Muang Thong Thani Immigration office on or before the 26th of Nov and trying for a 60 day covid extension.

You should have gotten the 60 days in Phuket...they are easier to approve vs Bangkok which appears now to be denying some applications

Try to the get the correct extension/visa for you requirements.

I HIGHLY doubt there are any farang immigration officers; they may have been volunteers.

>What is the correct way to get a further 60 day extension from Bangkok immigration?

You will be requesting a 60 day extension of stay based on unable to travel due to COVID-19. You will need the following:

1. Your passport and:

a. a copy of your data ("picture") page

b. a copy of your most recent visa (if you have one)

c. a copy of your most recent stamp

d. a copy of your departure card

2. [May be asked at Bangkok Immigration] A TM30, filed in the immigration office.

3. The forms (each immigration office may have different forms, and want to use their special forms). For Bangkok, they can be found in the group.

4. [MIGHT BE ASKED, bring just in case] A letter from your embassy saying you can not return, OR a print out from your embassy website saying they don’t issue the letters, OR a print out of a letter from the embassy saying they don't issue those letters. NOTE THE OR's Go to and see if they have any wording about the 60 day extension of stay based on unable to travel due to COVID-19

5. 1x passport pictures

6. 1,900 THB.

There has been a lot of reports about people being rejected.