I set up my checking account with US Bank in 2004, and it's been my primary checking account ever since then (direct deposit, etc) even though they have a lot of outdated practices (overdraft notifications are sent through mail, etc). Either way, I considered myself a loyal customer. After a set of backlogged checks got cashed at once in a situation way more complex and boring than is worth getting into, I had overdrafted. I discovered this through arbitrarily checking my account (they never let me change my mailing address, so my over-draft notification was being mailed to an old address).
I caught it pretty fast, but wanted to bring my account back into the black, so I went to my primary savings account (a different bank, about 3 blocks away from the nearest US Bank) and took out a $1,000 (not sure if the amounts matter) so I could get my checking account up to a healthy buffer.
I get the money in cash, take the envelope of money straight to the nearest US Bank, and (this was my mistake, apparently) I deposit it through the ATM (I was late for work at this point so I was in a rush.) I was a bit upset when I checked my account a few days later to see they listed my $1000 deposit as $800.
At this point, I complain via twitter (snarky message, "no one go here they steal from you" etc). I get a response from their social media department, they ask for my phone number and give me a call. They say they'll get the gears in motion and "investigate the situation." A week later, to no fanfare, I get a letter (at my old address, had to collect it) saying "We looked into the situation and decided we were correct." So at this point, there's still $200 in limbo of my money that US Bank, somehow, lost, and of course placed the blame on me.
I don't really like having my bank steal from me (might seem a bit reactionary, but I gave them a certain amount of money, and they lost a chunk of that and didn't make the difference, so I think it's an apt descriptor). I called the customer service line again, had them re-open the investigation (saying, in as plain terms as possible, "I know I gave you $1000. You then took $800. And now there's $200 I don't have") and they re-opened it, and had the branch manager of the location call me. He says that they will get back to me after they look into it.
The next day, the branch manager calls me to say, "So, I understand you needed assistance closing your account with us?"
After 8 years, US Bank stole $200 from me (might seem insignificant for some, but definitely NOT an insignificant amount for me) and when I said, "I'm not appreciating the way I've been treated in this situation, I might as well close my account" they just say, "Well, sir, in our opinion you only deposited $800. So how can I help you close your account?"
Needless to say, I'm never going to US Bank. And I'm trying to do my best to warn anyone else who would ever want to trust A: the bank and B: their ATMs.