Answered by Mukesh
Treat a gift card code like cash, because anyone who has the code can spend the value. Keep it private, store it somewhere only you can reach, and avoid posting it anywhere public or sharing it in a group where others might see it.
Be especially wary of anyone who contacts you out of the blue and asks for a gift card code, whatever reason they give. Genuine organisations do not demand payment in gift cards, so a request like that is a strong sign of a scam and should be refused.
When you give a card to its rightful recipient, use a private channel and encourage them to redeem it reasonably soon, which shortens the window for anything to go wrong. These simple habits keep the value where it belongs, with you or the person you meant to give it to.