I just got this email from my friend.

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 reverse.

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.

Well,thinking in a programmer way, make me wondering how the implementation would be.

There is an interesting story behind this and maybe you want to read it.

http://www.snopes.com/business/bank/pinalert.asp

My advice is,just go for google first if you want to forward any weird email that you got from you friends.