The redemption logs can be found at Support>Redemption Logs
These logs show overviews of API calls made by the POS for redemption requests. When viewing these logs, the "punch_key" value represents the barcode, without the checksum digit.
Copying this value and adding an extra digit (any number) will allow you to look up the barcode associated to the transaction present in the logs.
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)