When creating a redeemable, the "Remind Before" setting, found on page three (validity) of the redeemable setup, is inclusive of the first and final days of the redeemable.
Here is an example.
If a redeemable is set to expire on 11/5 and the "Remind Before" is set to trigger 4 days prior:
11/5 - Day 1
11/4 - Day 2
11/3 - Day 3
11/2 - Day 4 - Notification is triggered.
If you've set the expiry notification for a redeemable to be sent out 1 day prior, this will be sent out on the same day of expiry, within 12 hours prior to expiring. With the above example, this notification will be sent out on 11/5.
If you are looking to have these notifications sent out one calendar day prior to when the redeemable expires, configure the redeemable expiry "remind before" to "2."
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)