If the Reporter and Assignee are the same

[Shelly]

If the Reporter and Assignee are assigned the same person, does that perosn get two notification emails or one?

[Steven Behnke]

JIRA's default notification system will only send one email for each event, even if two notifications are triggered.

If you use a system for custom notification then all bets are off.

[Shelly]

Thank you for taking the time 

[Nic Brough -Adaptavist-]

Nope, it de-duplicates the recipients of the event notification.

[Shelly]

Thank you for taking the time