As reported by Consumerist.com, if you paid by debit or credit card, Walmart will look up your receipt and fax it to you.
Call the Walmart Electronics Payment Hotline on 479-277-2643. You will need the store location, the date of purchase, and the debit/credit card number and it is especially helpful if you know the amount from your statement.
For all Walmart.com buys, you can print an Easy Returns Receipt here. You can take your Easy Returns Receipt to the shop with you when you return your item, or you can return your Walmart.com buys by mail.
If you cannot print your Easy Returns Receipt, you can return your purchase to a Walmart store. Walmart's No Receipt policy applies to things returned in a store only.
In 2014, Walmart launched their eReceipt program. The eReceipt screen pops up at check out once you pay with your debit or credit card.
Milenomics.com examines Walmart’s eReceipt system and details how it works to help you decide if the system is worth trying for.