When I moved from the UK to the US, I left some money in my UK bank account for a bit... A few years later I called up customer service with "Hi can you please transfer all funds to this new account at another bank in another country, and close my UK account? I don't remember any passwords, don't have the 2fa fob you gave me, don't have the phone number you have on file and don't live at the address on file." They asked me when I opened the account, which branch it was at, and who my employer was, and that was all it took. The phone call was under an hour, most of which was spent on hold. All of the required "security" information could be figured out from my public LinkedIn. Scary stuff.