If you work Self Checkout, the MyDevice has a Shipt Audit app on it for prepaid orders. The shopper will have you scan their digital receipt and once the order pops up, take a look at their cart and pick three items from the list, doesn't matter what you pick and confirm that they have the items in their order.
It's also a good idea to say what the total of the order is (Ex. "I have a total of $10") and have them confirm it, because sometimes the totals don't match up.