My card would not work at Huahin hospital the other day even though I entered the correct pin.
I then tried 2 ATMS and said wrong pin
Then went to Bangkok Bank, lady cleaned card and went outside with me and I tried card machine said wrong pin and swallowed card.
I then went inside they issued new card, she said enter old pin if you want if you get it correct we don't charge you, I got it right, I never forget pin, then she said you want to change pin, I said yes.
They spent 1 hour copying my passport and checking visa I had to sign lots of copies and papers, had the wife with me,
Another bloke beside me was going through the same thing, His card stopped as well.
They were more interested in his passport.
I have had my account 18 years and I have to think this was a checkup.