Final answer:
Amazon asks for your gift card code to validate the balance and apply it to your purchase, typically during the initial account credit and at checkout. If you're prompted again after already adding it, check your balance or contact customer service, and be wary of potential scams.
Step-by-step explanation:
The reason Amazon might be asking for your gift card code after you've already chosen to purchase with a gift card is likely part of their purchase verification process. When using a gift card on Amazon, you need to provide the code so that it can be validated and the balance available can be applied to your purchase. This often occurs in two stages: initially, when the gift card is added to your Amazon account and its value is credited, and again at checkout to ensure the balance covers your current purchase.
If you've already added your gift card to your Amazon account, but are then prompted again for the code, it could be because the balance on the card is not sufficient for the current transaction, or there might be an error with the Amazon system. In such cases, double-check your balance or reach out to Amazon's customer support. It's crucial to never share your gift card code with anyone besides Amazon's official website, to prevent fraud or theft.
Always remain cautious, as asking for gift card codes can sometimes be a red flag for a scam, especially if the request comes from an unofficial or suspicious source. If you are ever unsure about the legitimacy of such a request, it's best to contact Amazon customer service directly for assistance.