It is not recommended to use another person's credit card to pay for a car rental unless you have their explicit permission and trust. Most car rental companies require the credit card to match the name of the renter and will not accept payments from someone else's card. Additionally, using someone else's credit card without their permission can result in legal consequences and damage to your personal relationships. It is always best to use your own credit card or to ask the car rental company about their policies and procedures for using a different credit card.