Did you know you can crowdfund tickets to an event??
When tickets are offered as a Reward item, they’re delivered via email. They (or the person they buy the ticket for) will receive an email with a printable ticket containing a QR code.
You can confirm the ticket is valid by scanning the code. It will be marked as valid no matter how many times it is scanned, so the best practice would be to tick names off manually to avoid sneaky duplicates.