No, most people would not be this agitated about a mistaken transaction being silently refunded. At best they'd probably assume the notification went to spam or something and went on with their day My bank doesn't notify me about any transactions, I have to check my bank book manually. Once a mistaken transaction showed up and disappeared a few hours later, with no trace left behind at all. I just assumed it was a mi…
In many (all?) countries, your bank would've acted criminally. If money has been deposited to your account, only you or a court order can get it out again. If somebody "just does it", they are on a similar legal basis as somebody that forgot a jacket in your house and decides to break your lock and enter your house without your knowledge or authorization to get it back.