I have heard of several people i know getting whacked for courtesy
overdraft fees in the hundreds and aven $12-1500 range. It appears
that pending transactions are not mentioned when customers call them
so they end up revising their check registers with incorrect
balances,causing overdrafts. I also know someone who was issued a
debit card and todl erroneously that the card was to be linked to
their savings, when it could not be. That person went a made a large
number of small transactions, each of which resulted in an overdraft
charge. When the person went to the bank they confiscated that
person's whole paycheck for 2 pay periods and would not reverse
overdraft charges even though bank personnel admitted their error.
This was in NH.