QR and barcodes are generated by Tickera based on the ticket code which is unique for each attendee/ticket. Each ticket may contain unique QR and/or barcode (along with the other elements) which you can arrange to suit your needs by using our ticket template builder . Now, to be able to place a barcode to the ticket template, you will need to install and activate our Barcode Reader add-on. With this add-on installed, you will get another ticket template element named suggestively Barcode. When this element is placed on the ticket template, you will be able to place barcodes to your ticket template which is convenient if you intend on using any standard barcode scanner device to check the tickets in via our Check-in Chrome Desktop app.