Hah that happened to me a few years ago too. HSBC emailed me all the login details for someone’s internet banking account. I emailed back saying they had the wrong email address for their customer. They said if I wanted to change the email address on the account I’d need to go into a branch to do it. It took several attempts back and forth before they finally just disabled internet banking again for that account.

But that was way too much effort. I don’t bother now. My Gmail address (josephg) is a cornucopia of junk. It gets the pay slips from a mechanic, lollypop orders, delivery notifications for shoes, Indian cell phone bills, and all sorts of things. I declared bankruptcy on that account years ago and moved on.