One of the most important things to pay attention to when using an ATM is the security of your card PIN.
Considering that ATMs are where customers carry out their cash transactions, it is only natural that they are among the places most favored by fraudsters.
Given this, there is a lot of discussion about what to do if you encounter a suspicious situation while using an ATM.
One of these claims is that if you encounter a suspicious person while withdrawing cash at an ATM, entering your PIN in reverse sends a signal to the police, prompting them to take action. This claim is not true.
There is no integration between any bank and the police for this purpose.
Moreover, for this to work, the bank would need to check the PIN at the moment the transaction is made, determine that it is the reverse of the original PIN, identify the nearest police unit, and contact them, all in real time during the transaction, and as someone who has worked for years in authorization, approving card transactions, I have never come across such a check.
In short, the rumor about entering your PIN in reverse at an ATM is an example of social media engineering and an untrue marketing tactic.