Good evening Monty and welcome to the Events Calendar forum!
Thank you for your interest in our products.
We’ll be glad to answer your questions.
What information comes on the actual tickets
By default, the tickets look exactly like this: 
how do we know someone hasn’t copied someone else’s ticket? How do we know that it’s unique?
Each ticket has a unique ID and a security code.
Furthermore, you can check-in the attendees (either electronically or via a QR code scanner app).
You can read about this here: https://theeventscalendar.com/knowledgebase/managing-your-orders-and-attendees/
Let me know if that helps.
Have a great day!
Geoff B.