I had a similar cold call years ago. It may have been my bank or possibly a utility, and the call was related to fraud of some sort. When I asked to call them

I had a similar cold call years ago. It may have been my bank or possibly a utility, and the call was related to fraud of some sort. When I asked to call them back to verify, they said (from memory): - Call us back on the main line, you can find it on website. - Press option 9 - Enter the five-digit code: 51762 And got transferred straight back to the caller. I thought this was a fantastic idea.