By mid January all commissaries will be scanning all military IDs upon check out. This is per a Defense Commissary Agency program. Customers will NOT be allowed to opt out of the scanning. According to the article put out by the Navy Times, DECA will not be collecting any personal data such as addresses or phone numbers.
This process will allow DECA to see who is using particular commissaries such as retirees, reservists or active duty.
Please check with your local commissary to see when this process will be started in that location.