Do not share your PIN number to anyone, not even your family members or close friends.
Do not write down your PIN number anywhere, especially avoid keeping it in your wallet.
Do not let others see your PIN number by covering up your finger movements when you are pressing down the pin pad buttons or entering your PIN number.
Change your PIN number periodically with a combination of unique and complicated numbers that are hard to guess by others.
Beware of any attempt of fraud by anyone claiming to be BCA employees asking you for your personal data, including PIN number, through phone, fax, or email. BCA employees would never ask about or request your PIN number.