You can use a Walmart plastic Gift Card at:
If your card does not have a PIN, you can use it only in a Walmart store or Sam's Club.
Walmart eGift Cards can be used at:
You must have a copy of your eGift Card email to use in a Walmart or Sam’s Club* store during checkout.
To use at a Walmart Gas Station: print the eGift Card and trade it in for a plastic gift card at any Walmart Store.
*If you are not a Sam's Club member, you may shop at a Sam's Club store or Samsclub.com, but a 10% service fee will apply.