Your Amazon gift card balance can be checked via the Gift Card section of your account on the website or the app.
You can split payments on Amazon between an Amazon gift card and a debit or credit card, but not two credit cards.
When you redeem a gift card, Amazon adds the full value of your card to your account. You can then use these funds to buy eligible items on the site, according to HowtoGeek. You can't buy other Amazon ...
I am constantly receiving Amazon gift cards as a thank you from various people, which I love because I know I will be able to redeem them quickly. But sometimes the cards don't have an amount printed ...