Do I need a sponsorship letter for my DTV application in Thailand?

Your GamePlan: If you want good support, get them parents if they can, to put 15k € in your bank soon and let them add another 2k per month over the next 6 months. That will do. At the end after approval return it to the parents. They gave you a body. They may do this too. In the meantime stay on regular Tourist if you have to be in Thailand already.

@Wannikea ********

just got the 500k THB deposited into my account 2 weeks ago and I planned on applying for the DTV on January 5th but just found out the 500k balance must be maintained 3 months before I apply. I wrongly thought it was 3 months before I landed.

I was kind of devastated and the teacher I spoke with said if I applied with the money only hitting my account for a few weeks I would be denied.

He mentioned the whole sponsorship thing. So they just need 3 months worth of bank records from a family member who will sponsor you? Nothing else?

If you have the 500k you don't need a sponsorship letter. However if the consulate gets back to you and asks how you will support yourself, then you could consider supplying a sponsorship letter and bank statement from your parents.