I Am also doing my first extension (OA) in Feb and faced with a similar problem. Not quite sure how to prove for 12 months as we arrived in March but were only able to open Bank accounts in April and used cash USD converted to Thai Baht for first month. For this I still have the documents showing the purchase of USD in South Africa and then the conversion to Baht from Kungsri. I intend to use my Monthly payslips from my Pension provider (private) as source of fund and then show copies of the actual forex transfer transactions from my Home bank (South Africa) to Bangkok Bank. Local statements will show deposits into BB.

@Ruth ******

so where did you find the detail for this VIsa?I thought it was only if married to Thai ?Please advise as this could work if We can qualify without 800 K BhtFunds .

@Andy *********

Thanks Andy, We will have to try this route failing all else.

@Graham *****

Thanks Graham, Not sure what the requirements are for this Type of Visa. Is this the same as a METV?

@James *******

Thanks James ,failing all else I will use this option. Was hoping to avoid Bouncing.