Can I use a promotional code on Amazon?

If you use a promotional certificate for a purchase on Amazon.com and then the order is returned for a refund, the promotional certificate will not be available for re-use, as promotional certificates are for one-time use. Promotion codes may not be applied toward the purchase of gift cards, sales tax, gift wrap, or additional shipping costs.
For More Information Please Refer:
https://www.amazon.com/gp/help/customer/display.html?nodeId=201895180
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