Bank card Pin number

S&H Electronic Services who do online purchases to their customers, before purchasing an item you have to register. When it came to the payment prosses, you have to give them all information needed to do the delivery, the last piece of information on your PC is to submit your Bank card number and confirm your purchase, then they direct you to unlock your mobile phone and again to confirm your purchase, the next thing that pop-up on your mobile they ask you for your Bank card PIN which the banks warned their customers to never gave your PIN to anyone.