I generated certificates with incorrect information. How can I send new ones?
For this, you should enter correct information first.
If it was information about an event, open it -> click Edit on the Overview tile -> change the information and click Save.
If it was information about an attendee (e.g. name or email address), open their Attendee profile -> click the Edit button -> change the information and click Save.
After that, regenerate certificates. They will contain the updated information. You can find the instructions on how to do it in this article.