Located in south wing of Faction Stronghold.
Commendations Officer tells you, "You have not recently turned in any Commendation Ribbons."
Commendations Officer tells you, "An Initiate of our Society is allowed to turn in a total of 50 Commendation Ribbons per week."
Commendations Officer tells you, "To turn in Commendation Ribbons, simply have at least 5 Ribbons in your inventory, and hand me one. I only deal in transactions in lots of 5, so if you have less than that, you'll need to get more before you come back here."