I recommend Fight EVO360 Pattaya, everyone there is extremely friendly and they work great with beginners and make you feel very comfortable training, you can also look at their google reviews which tells you a lot about them , that’s how I found them
I got mine approved going through Fight EVO360 Pattaya, I received a paid invoice, signed invitation letter, and they sent me a copy of their business documents showing their registered with the sports authority and business license. I went to Laos and was approved in 3 days with no problem
I got mine from Fight EVO360 Pattaya, there was no extra fees for the paperwork and they give a guarantee if denied with proof you can get your money back