Niece had to pay if she wanted another treatment from another public hospital where she thought it was better for her than the public hospital of her district.
I never have my passport when I travel inside Thailand. I have my pink card and driving licence and never had a problem (and in my phone pictures of my passport picture page and visa pages.. but not for the hotel.. for police control if need... but never been asking for)
Yes, I prefer to go and to be kindly mocked that to get problems... especially because in march another officer told me that I forgot my TM30 in January and that I had to do everytime at my arrival.... same immigration... 2 differents sounds