What qualifies as an invalid paper receipt?

The following receipts do not receive cash back: 

• Receipt previously uploaded by you or another user 
• ATM receipts 
• Money orders 
• Lotto tickets 
• Credit card slips 
• Packing slips  
• Pictures of receipts on a device, barcodes, QR codes, or coupons 
• Pictures of electronic receipts  
• Handwritten receipts 
• Receipts not in English