What documents are needed for a DTV 180-day extension at immigration in Thailand?

You risk getting your visa cancelled by applying for an extension.

you basically need everything again that you put in your application but also freshly dated. so you need every document new. plus more, whatever the office requests like residency proof with housebook, pictures, etc… just border bounce and save yourself headache and time

So much easy to buy a $60 ticket to Vietnam

Immigration don't want anything to do with the DTV. They have no way to verify any of the documents you show them. Hence they make it as hard as possible so you give up and bounce.

I tried to get an extension at Chaeng Wathhana. It was refused and the following additional documents were requested (Soft Power) -

Updated bank statement above 500k THB

Photo printout proof of attendance at cooking classes till now

Letter from Cooking school / govt body to Immigration Officer to extend my stay in Thailand by 6 months

Letter from Govt for affiliation of School to OPEC Thailand (This one may be hard to obtain)

I had carried the following documents originally -

Passport bio page copy

DTV Visa Copy

Latest visa stamp copy

90-day report copy

TM30 printout

TM7 Visa Extension Form

Bank Statement (500K must be deposited 1 month ahead)

House rental contract

Rent transfer receipts (Your name and Renter name should be on those)

Resume / CV

Cooking class student enrollment & payment receipt

Cooking class class appointment schedule (future)

Cooking class company registration & seal

Same as applying

You're essentially re-applying, so all the same stuff you had to provide at application. Much easier to just take a little vacation somewhere outside of Thailand.

Three different purposes with total different requirements and you ask to post all three:

There is 1 typo in this one, please do not get angry.

Same as application

Requirements are different depending on what office you use. Go to your local office and get their hand out. It is not recommended to get an extension the process is basically reapplying for the Visa with all updated paperwork.