One of the PvP vendors in the Imperial Fleet accepts both Warzone Commendations, that you get for participating in warzone matches, and Mercenary Commendations.
What are those Mercenary Commendations? How do you get them?
What are Mercenary Commendations
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Best Answer
They are no longer obtainable, but used to be awarded for World PvP and Ilum. They could also be found in chests in the PvP area Outlaw's Den on Tatooine. You can trade them in at the PvP vendor: 30 Mercenary for 10 Warzone comms.