Sure, I have friends who've had their internet bank accounts hacked and have lost thousands of dollars they simply can't get back. (Back in the old days of manual banking, my "manager" at the time deposited about $10,000 of cheques made out to me into HIS account. Even though the bank slipped up allowing him to do that, he spent the money and I never saw it again!)
However, I now have to check my internet banking account almost daily. Why? Am I afraid someone will steal from it? No, quite the opposite.
Last week I discovered two payments both over $500 deposited into my account. I spent about 30 minutes trying to figure out where they came from (often clients will pay us electronically... but not tell us they have). I couldn't figure this one out though, so I called the bank.
The nice man at VTU explained that it was my salary. I explained to him that I don't receive a salary and he told me that I do. Eventually, he realised that it was a salary, just not mine, and so the payment was reversed. I told him that I was very concerned that someone else's wage could end up in my account because that meant that my deposits could just as easily end up in someone else's account and I would never know.
He either didn't get it or didn't care.
Back in February Eastern Plant Hire deposited $561 in my account. I called them and asked what it was for. They apologised and said it was supposed to go into someone else's account and I thought the matter was over. Until today when I received a threatening letter demanding I repay them the money immediately. I called Eastern Plant Hire and explained that I had done the right thing back in February and was offended at the tone of their letter. Her response "Well what do you want me to say?"
So, if you keep a "tight ship" accounts-wise like I try to do, keep checking your bank statements every day. Thankfully, it's not such a big issue, but imagine if you only had a balance of $300 and someone demanded repayment of $600 immediately after they accidentally slipped $600 unnoticed into your account months ago.