TOPIC: barcode scanner: advice needed from DTH community

Who here is using the barcode feature in version 2.6.8? I'd like to know what scanner you're using and what type of setup and configuration is required.
Are you able to scan confirmation emails out-of-the-box?
For users who fail to bring their email confirmations, what is your workflow for verifying their registration?
does the system know whether a particular code has scanned?
what scanner are you using?