Once a gang of thieves called my former bank - which no longer is in business - and asked to change my address to their PO box.

The bank just did it without verifying anything.

The next day I was in my bank, and I happened to glance at their computer screen and I noticed the address change - and I made them change it back, and I made them put a note on my account to not allow anything like that in the future.

Before I could switch banks - they were bought by a much larger bank with better security.

BTW, the NYPD, the Postal Service and the FBI didn't care enough to take any kind of action when I called them. Only the FBI was even willing to talk to me but they did nothing.