You may want to know which discount codes have been used, how many and by whom.  

You can find out which of your registrants used each discount code by creating a registrant report.

How to get there:

Login to the Wizadjournal admin backend.

Click on the menu tab “Registration". 

Click on the second icon, "Attendees" adjacent to your event name.

Under the "By Registrant" heading, click on "Export Registrant Data Without Survey Questions/Answers".

What to do:

Click on the Export Report button and an Excel file will begin to download.

Open the file, and scroll to Column N, Discount Code.

Whoever used a discount code will have the code name displayed there, so you can Sort by the column to find the information you need.