What should I do if my international transfer is not recognized for my Non-O visa extension in Thailand?

Every immigration office seems to interpret the rules differently. Talk to them.

My immigration office won't accept bank statements without a proof of income certificate from my home embassy... Uk, Australia and US embassies don't provide this, so I'm forced to use an agent...

Man I wish I had the same kind of people commenting on your post lately there's been some toxic people by all means work things out the best of your ability take your time try not to overstay your Visa

My understanding, you should be able to get a "Confirmation Letter of International Fund Transfer" from Bank of America in Bangkok (the bank that actually received the international transfer). This will confirm for immigration. As your bank said you'd need to contact BoA to get this.

You have to transfer USD to USD not to Thai bath. Then you can out the purpose on credit advice.

Sounds like you were using Wise incorrectly for your transfers. You use the "reason" being the last option in this drop down menu

This happened to me once, for one transaction, and I spent about 90 minutes in k-bank getting the 'advice' paperwork. I had it in my folder when I went to immigration. They didn't ask for it.

I'm suspecting it depends on the officer and the office. Some would accept you showing statements from the money source, and corresponding deposits in your Thai bank. Others wouldn't accept it if it were plated in gold and stamped by Moses.

I am in a similar situation, one of my pensions is paid into Citibank in BKK and then transferred to my SCB account. SCB contact Citibank for me and get statements for immigration showing the payments as international. I think it takes them about 3 working days to arrange.

They have been accepted in CW, BKK and in my current office in Kanchanaburi

I don't use an agent, I do it all myself. If you have the money coming in each month why throw it away on an agent?

If you can show the paper trail, amount leaving your AUS bank on X date, same amount being deposited into your Kbank account on Y date, any reasonable IO will accept the documents.

You need to get the FET document from the receiving bank for each transfe which will specify your name and amount. This will satisfy immigration. It's straightforward enough.

This happened to me with one single month of a transfer when it went through Kasikorn Bank instead of directly to my account at Bangkok Bank as a international transfer. I went to Kasikorn Bank and got a copy of the transmittal from WISE to them, clearly marked as International, but Immigration at Chang Wattana would not accept it, and denied my extension. As I did it on a Friday and on the last day of my current extension, they told me I would be in overstay if I waited until Monday to come back and argue the case. I gave up and flew to Phnom Penh for the weekend and came back with a 30-day visa exempt entry, and went back to the U.S. and started all over again with a new Non O-A application. Fortunately I had the funds to pay for it and re-qualify for the new application at the Royal Thai Embassy in Washington. Since then, I check every single transfer withing 24 hours to make sure it shows as an international transfer.

The statement doesn't need to say it if the bank will issue you a credit advice stating that the transfers were international. Since they're able to tell you exactly how they were transferred, they should be able to issue this to you and you can use it for your extension.