Daily Commendation

Daily Commendations are currency items that can be earned by completing daily and weekly missions on the planets Belsavis and Ilum and from The Black Hole and Section X. They can be used to purchase specialty items from Mission Support commendation vendors.

Source
Daily Commendations are mission rewards that can be obtained from daily and weekly missions. They can also be obtained from hard mode flashpoints.
 * Weekly mission reward