There are a few reasons your receipt may have been rejected;
Your receipt was either in the incorrect format
It wasn’t clearly visible in the photo you submitted
It may have been deemed invalid because it was for the wrong merchant
The card used was not your registered card
It was paid for with cash NOT card.
If your receipt has been rejected it will state in our email from the receipts management team why. In most cases you can resubmit this with the correct changes made.