How do you know if someone has paid for there tickets?

When somebody purchases something on your Reunion page, you will know in two ways:

1) You will get an immediate email showing what the Classmate purchased.

2) On your Reunion Attendees page, at the bottom, you'll be able to click on "Show transactions". Doing this will show you all transactions that have occurred. You don't have the "Show transactions" link at the bottom of your Attendees page currently, because nobody has purchased anything yet.