Unused Dierbergs Rewards points expire 12 months from when the points were earned. You can view the information on when your points will expire on the Dierbergs App.
In the App, go to "Account" (tap green person at top left) à“History” à “Rewards History” à “Points expiration” to see if you have points expiring soon. We have included screenshots below as examples of upcoming expiring points vs. no points set to expire soon.