Answer:
1. Protect your security pin.
2. I would recommend this so that the person does not become a victim of online theft.
Explanation:
A prepaid card is a form of financial card that is preloaded with cash such that the user can make purchases with it at anytime. If I know someone who is going to use a prepaid card, I will inform that him to safeguide his security pin because this card just like other financial cards can be accessed by online criminals who can use the pin to make purchases in the guise of the real owner of the card.
This card is just like raw cash, but it is different because the cash is not physical but in a card form protected by a pin. The pin should never be divulged to another person.