How can attendees receive a check-in QR code?

QR codes can be received in two different ways:

After registering for your event through CrowdPass, you will receive a QR code to your email that you registered with. You can add this QR code to your Apple Wallet.
Event organizers can send out QR codes to all of their attendees through CrowdPass either via Email or SMS message by bulk uploading them into the platform

CrowdPass Support Center