If you ever have a guest who scans a barcode and gets a minimum amount error even though they have an item on the receipt above the minimum know that this often times results from changes made to the order dropping the order below the minimum.
The Punchh system goes off the last receipt copy received for the order, so if the first receipt shows the item but the second receipt shows the total below the minimum check in amount the error will pop up.
Example receipts: