PIN number reversal

I stumble upon my old e-mail folder again and found this useful tips.

If you should ever be forced by a robber to withdraw money from an ATM
machine, you can notify the police by entering your Pin # in rev erse.

For example if your pin number is 1234 then you would put in 4321. The
ATM recognizes that your pin number is backwards from the ATM card you
placed in the machine.

The machine will still give you the money you requested, but unknown to
The robber, the police will be immediately dispatched to help you.

This information was recently broadcasted on TV and it states that it is
seldom used because people don't know it exists.