I accidently pass someone my credit card. The person who holds my credit card is trustworthy. However, she insist on me to block the credit card just to be safe. She is on a trip for a month so it is not possible she will give me back the credit card anytime soon.

Is it possible temporary block the card for a month? If so, any penalty? Would it be better to replace the card, and will there be charges for this?

Temporary block then unblock got any service charge?