You may want to update your participant's email information.
How to get there:
You'll be on the Campaigns window of the Control Panel.
Choose the campaign's name or the edit link to the right of it.
What to do:
Click on the Participant tab.
Scroll down to the name of the participant you’d like to make changes to, or enter their last name in the search box.
Click on the first action item, the Edit button (pencil icon) adjacent to the name.
Enter the corrected information and click Save.