I was once a Key Bank customer who was billed more than $2000.00 in overdraft fess in one year. From my experience with Key Bank they give you a fake line of credit...one that tells key how much you are willing to pay in overdraft fees. Even though you don't have enough money in your account, they will still let you use the debit card untill you reach the overdraft limit Key sets for your account. Key told me on several occasions that they have re-arranged my purchases from largest to smallest, instead of real time in order for my "more important purchases to get funded"..More important being the larger ones. I requested several times that this qwaze credit line be set to zero. That worked for a couple months and then my erroneous fee credit line would be back up to two or three hundred dollars.
This was just one of several things that were totally illegal. There were many other things that happened during my time with Key. I no longer have problems once I switched banks.