We are doing a large quiz. People enter their own names at the beginning.
The issue is that how do we contact the person who wins without someone else with the same name contacting us and taking the prize.
For example - Peter wins Quiz #1
We do the quiz on Zoom. We say to Peter please email your contact details to firstname.lastname@example.org so we can send you your prize.
Another Peter hears this and sends an email to Bob. How do we know which is the real Peter?