Write her a letter of invitation stating that you will cover all costs. Lodging, food, health insurance, etc. Provide 6 months of bank statements showing that you can actually afford it. If she has a travel history then show that also. Buy a refundable round trip ticket for her. If you don’t get a visa for her then get a refund. It comes down to her having a reason to return to Thailand. The more proof the better. Keep us posted.
Don’t pay an agent. They can’t guarantee anything.
I’m on a non o based on retirement. I used the over 65 k monthly income method. I don’t have 800 k in bank. I didn’t even have a bank account when I first applied. ( I do now though). I thought you knew this.
I’m on a non O based on retirement. I don’t have 800 k in bank. My monthly income is over 65 k Bhat a month. I provided proof with a verification letter from the Canadian Embassy. Yes I know most countries don’t issue the letters. You can also use bank statements to show your monthly income. I was already in Thailand.