Confirm who they are
Match the request to the account that completed the course.
Check completion
Make sure the course is marked complete before you send anything.
Fix the details first
Ask how their name should appear and correct it before re-issuing.
Send the file and a link
Attach the certificate and share a link to download it again later.
Say what it is for
If employers check certificates, explain how they can verify yours.
Note the change
Record the re-issue in the ticket so the next request is quick.