Expect that 10-30% of participants do not have to bring a ticket
Print administrations QR code for quick access
Print your participant list on paper as a backup, if the Internet is not working
Avoid printing on the spot, this may take too long and the printer may fail
Print badges before check in, if necessary in envelopes with names above links, then in card boxes with name register
Keep the check in short, no longer than 10-20 seconds. Otherwise you have queues at big events
Use multiple check-in stations, one station can process between 50-200 persons for an event depending on the check-in duration (10-20 seconds) and the time window for check-in (15-30 minutes)
Ensure a stable infrastructure with WLAN, the telephone can be quickly overloaded at large events
Do not forget to press '+' after scanning the ticket, then the participant is checked in
If possible, set up a hospitality desk with a desktop or laptop in order to be able to handle all special cases more easily (for example, the participant has canceled and wants to participate anyway)