I would like to know if this was a one off (doubt it) or if she’s a career criminal. If it’s the latter, all bets are off. I remind you that in other countries not far from Thailand people lose a hand for stealing.
I’m American, but I suspect the criteria is similar. They’re not particularly interested in where your GF will be staying, etc. They want to see proof that she has a life in Thailand that she does not want to abandon. Caring for a mother, kids, perhaps a house. These things will bring her back to Thailand. That’s what they want to see.
? If you want to change $100 dollar bills, not only must they be crisp and wrinkle free, but they have to have the blue reflective stripe down the middle that newer bills have. I was just in Thailand and brought home several bills everyone refused.
Time was, this is how immigration workers in the US behaved, also. I have many dual citizens in my family and they say, 1) don’t flaunt the fact that you have 2 passports. 2) Enter each country with the appropriate passport. Then there are no stamps involved.