Nooooo, would I do that....🤗
Like yourself I have handed over my passport many times at the bank, they walk around with it, disappear with it, they do their thing with it, but, read on.
Went to a hospital for an operation in K.K., I had the money in my bank to pay the bill. Handed over my card to pay, it was rejected........😱
Which at the time was all I needed, a bill paying prob. Luckily there was a BKKBank on site, I went there and told them the problem, ended up with the manager.
To cut a long story short, on my account I was listed as a tourist, something like that, instead of a long stay visa holder, there was a withdrawal cap of 50,000bht on a "tourist" withdrawal.
Aaaaah, the kind lady fixed everything for me to pay the bill, she said go back to your branch and show them your long stay visa, then you will not have a problem in the future.
So it seems the bank does or should look at things......😉