After you pay at a merchant with your Postmates Prepaid Card, you'll need to upload a photo of the receipt and type the total amount into the app so it will charge the customer appropriately. If the order was pre-paid, the app will let you know (you won't need to swipe your card or upload a receipt).
Once you have checked off each item on the Shopping List, the Fleet app will prompt you to take a photo of the receipt. If you're having issues getting to the screen where you upload the receipt, be sure you have scrolled and checked off each item on the Shopping List.
Only after you've swiped your card, take a clear photo of the entire receipt with all item names, prices, and the total. Do not upload the receipt until you have physically swiped your card. After you're done uploading, include the receipt in the bag for the customer!