Sometimes the check-in thing doesn't work like it should and the transaction will show up as 'processing' for weeks so its best to always get a receipt. Otherwise you have no way of receiving your reward. Its a pain but it happens frequently. Update 3-18-21 app continues to crash at the worst times. I hope they honor the 33% cashback at Jets pizza because I can't get the app to open to upload the receipt. I've completed stopped referring people to this app for these reasons.