A regretitation is an apology concretized into physical action or physical item. It is intended to restore relationships and community. It is a concretized restorative action.
If someone harms another by running over their mailbox, a regretitation may be showing up the next day to restore their mailbox. A regretitation may be showing up with a new mailbox altogether. Or both.
Regretitation is a restorative leadership practice.