All I submitted was a letter from my doctor in Bkk that stated I am a patient of hers and that hospital. It was on official hospital letterhead and signed by the doctor. Was approved no problem with no additional documents requested.
The only thing I submitted was a letter from my doctor in Bangkok stating I was a patient of hers and of that hospital. It had my passport number and hospital ID number in it. It was on official hospital letterhead and signed by the doctor.
Mine wasn't denial but was medical. I didn't show any appointments, I just got a letter from my doctor saying I was a patient of hers and the hospital. It was on official hospital letterhead and signed by the doctor.
it all depends on the applicant. My girlfriend had no problem getting a tourist visa for the USA. You just have to make sure you have a reason to return. They also like to see you have traveled before in your passport and have returned to Thailand.